,F =2→1) toward three Galactic supernova remnants: W 28, (2009)
M. J Claussen, D. A. Frail, W. M. Goss, R. A. Gaume, Mhz Π
We present arcsecond resolution observations from the VLA1 with full Stokes polarimetry of the ground-state satellite line of the hydroxyl molecule (OH) at 1720.53
Scattered Nebular Light in the Extended Orion Nebula (2009)
We have combined 327.5 MHz radio observations and optical spectroscopy to study conditions in the Extended Orion Nebula. We see a steady progression of characteristics with increasing distance from...
NGC7538 IRS1 - an ionized jet powered by accretion (2009)
Sandell, G., Goss, W. M., Wright, M., Corder, S.
Analysis of high spatial resolution VLA images shows that the free-free emission from NGC7538 IRS1 is dominated by a collimated ionized wind. We have re-analyzed high angular resolution VLA archive...
Zhao, Jun-Hui, Morris, Mark R., Goss, W. M., An, Tao
We present new results based on high-resolution observations of Sgr A West at the Galactic center with the VLA at 1.3 cm. We measured proper motions for 71 compact HII components. We also...
Lazio, T. Joseph W., Brogan, C. L., Goss, W. M., Stanimirovic, S.
This paper reports dual-epoch, Very Long Baseline Array observations of H I absorption toward 3C 147. One of these epochs (2005) represents new observations while one (1998) represents the...
Chatterjee, S., Brisken, W. F., Vlemmings, W. H. T., Goss, W. M., Lazio, T. J. W., Cordes, J. M., ...
Astrometry can bring powerful constraints to bear on a variety of scientific questions about neutron stars, including their origins, astrophysics, evolution, and environments. Using phase-referenced...
A Precise Distance to IRAS 00420+5530 via H2O Maser Parallax with the VLBA (2009)
Moellenbrock, G. A., Claussen, M. J., Goss, W. M.
We have used the VLBA to measure the annual parallax of the H2O masers in the star-forming region IRAS 00420+5530. This measurement yields a direct distance estimate of 2.17 +/- 0.05 kpc (
A Search for H2CO 6cm Emission toward Young Stellar Objects III: VLA Observations (2008)
Araya, E. D., Hofner, P., Goss, W. M., Linz, H., Kurtz, S., Olmi, L.
We report the results of our third survey for formaldehyde (H2CO) 6cm maser emission in the Galaxy. Using the Very Large Array, we detected two new H2CO maser sources (G23.01-0.41 and G25.83-0.18),...
Goss, W. M., Richards, A. M. S., Muxlow, T. W. B., Thomasson, P.
We present MERLIN observations of Galactic 21-cm HI absorption at an angular resolution of c. 0.1-0.2 arcsec and a velocity resolution of 0.5 km/s, in the direction of three moderately low latitude...
Reines, Amy E., Johnson, Kelsey E., Goss, W. M.
We present a multi-wavelength study of embedded massive clusters in the nearby (3.9 Mpc) starburst galaxy NGC 4449 in an effort to uncover the earliest phases of massive cluster evolution. By...
Internal Dynamics of the Hypercompact H II Region G28.20-0.04N (2008)
Sewilo, M., Churchwell, E., Kurtz, S., Goss, W. M., Hofner, P.
High resolution (0.15") Very Large Array observations of 7 mm continuum and H53a line emission toward the hypercompact H II region G28.20-0.04N reveal the presence of large-scale ordered motions. We...
Roy, A. L., Goss, W. M., Anantharamaiah, K. R.
Context. Gas ionized by starburst activity radiates radio recombination lines (RRLs), from which one can derive the plasma conditions and the number of massive stars formed in the burst, free of dust...
Non-thermal Emission in Sagittarius B? (2008)
Lang, Cornelia C., Palmer, Patrick, Goss, W. M.
We summarize three recent publications which suggest that the Galactic center region Sagittarius B (Sgr B) may contain non-thermal radio components (Crocker et al. 2007, Hollis et al. 2007 and...
Roy, A.L., Goss, W.M., Anantharamaiah, K.R.
Open Access.
A Search for H2CO 6 cm emission toward young stellar objects. III. VLA observations (2008)
Araya, E. D., Hofner, P., Goss, W. M., Linz, H., Kurtz, S., Olmi, L.
We report the results of our third survey for formaldehyde (H2CO) 6 cm maser emission in the Galaxy. Using the Very Large Array, we detected two new H2CO maser sources (G23.01-0.41 and G25.83-0.18),...
Proper Motions of PSRs B1757-24 and B1951+32: Implications for Ages and Associations (2007)
Zeiger, B. R., Brisken, W. F., Chatterjee, S., Goss, W. M.
Over the last decade, considerable effort has been made to measure the proper motions of the pulsars B1757-24 and B1951+32 in order to establish or refute associations with nearby supernova remnants...
Jun-hui Zhao, Jun-hui Zhao, D. A. Roberts, W. M. Goss, D. A. Frail, National Radio, ...
(thecompactradiosourceattheGalacticcenter):F ollowingitsfirstdetection; thef luxdensityoftheGalacticCenterTransient(GCT)increasedrapidlytoamaximumonemonthlater;...
Thomas G. Pannuti, Christina K. Lacey, W. M. Goss, Charles G. Hoopes, Marcus A. Magnor
We have conducted a multiwavelength (X-ray, optical, and radio) search for supernova remnants (SNRs) in the nearby Sculptor Group Sd galaxy NGC 300. Our Very Large Array (VLA) radio observations at 6...
Subarcsecond Observations of High Mass Star Formation in the W49N Region (2007)
A. Wootten, David J. Wilner, Chris G. Depree, W. M. Goss, William J. Welch, E. Mcgrath
Abstract. We present multi-frequency subarcsecond images of the high mass star forming region W49N. The images, with resolution from 0: 00
Luis F. Rodr'iguez, W. M. Goss, Robert Williams
We report the detection of 21-cm line emission from H I in the planetary nebula NGC 7293 (the Helix). The observations, made with the Very Large Array, show the presence of a ring of atomic hydrogen...
RevMexAA (Serie de Conferencias), 14, 24--24 (2002) (2007)
Vla Radio Continuum, W. M. Goss, S. Pineault
ituto Argentino de Radioastronom'ia, and FCAGLP, La Plata, Argentina National Radio Astronomy Observatory, Socorro, USA D'epartement de Physique et Observatoire du Mont M'egantic,...
RevMexAA (Serie de Conferencias), 14, 24--24 (2002) (2007)
Vla Radio Continuum, W. M. Goss, S. Pineault
ntino de Radioastronoma, and FCAGLP, La Plata, Argentina National Radio Astronomy Observatory, Socorro, USA Departement de Physique et Observatoire du Mont Megantic, Universite Laval, Quebec, Canada...
VLA Limits for Intermediate Mass Black Holes in Three Globular Clusters (2007)
Bash, F. N., Gebhardt, K., Goss, W. M., Bout, P. A. Vanden
The observational evidence for central black holes in globular clusters has been argued extensively, and their existence has important consequences for both the formation and evolution of the...
An H2CO 6cm Maser Pinpointing a Possible Circumstellar Torus in IRAS18566+0408 (2007)
Araya, E., Hofner, P., Sewilo, M., Goss, W. M., Linz, H., Kurtz, S., ...
We report observations of 6cm, 3.6cm, 1.3cm, and 7mm radio continuum, conducted with the Very Large Array towards IRAS18566+0408, one of the few sources known to harbor H2CO 6cm maser emission. Our...
A Review of H2CO 6cm Masers in the Galaxy (2007)
Araya, E., Hofner, P., Goss, W. M.
We present a review of the field of formaldehyde (H2CO) 6cm masers in the Galaxy. Previous to our ongoing work, H2CO 6cm masers had been detected in the Galaxy only toward three regions: NGC7538...
The Distance to SS433/W50 and its Interaction with the ISM (2007)
Lockman, Felix J., Blundell, Katherine M., Goss, W. M.
[ABRIDGED] The distance to the relativistic jet source SS433 and the related supernova remnant W50 is re-examined using new observations of HI in absorption from the VLA, HI in emission from the GBT,...
VLA H53alpha observations of the central region of the Super Star Cluster Galaxy NGC 5253 (2007)
Rodriguez-Rico, C. A., Goss, W. M., Turner, J. L., Gomez, Y.
We present observations in the H53alpha line and radio continuum at 43 GHz carried out with the VLA in the D array (2'' angular resolution) toward the starburst galaxy NGC 5253. VLA archival data...
Kopylov, A. I., Goss, W. M., Pariiskii, Yu. N., Soboleva, N. S., Verkhodanov, O. V., Temirova, A. V., ...
A strong emission line at 6703A has been detected in the optical spectrum for the host galaxy (R=23.1) of the radio source RC J0311+0507 (4C+04.11). This radio galaxy, with a spectral index of 1.31...
The All-Wavelength Extended Groth Strip International Survey (AEGIS) Data Sets (2007)
Davis, M., Guhathakurta, P., Konidaris, N. P., Newman, J. A., Ashby, M. L. N., Biggs, A. D., ...
In this the first of a series of Letters, we present a panchromatic data set in the Extended Groth Strip region of the sky. Our survey, the All-Wavelength Extended Groth Strip International Survey...
GMRT and VLA observations at 49cm and 20cm of the HII region near l=24.4d, b=0.1d (2007)
Kantharia, N. G., Goss, W. M., Roshi, D. Anish, Mohan, Niruj R., Viallefond, Francois
We report multifrequency radio continuum and hydrogen radio recombination line observations of HII regions near l=24.8d b=0.1d using the Giant Metrewave Radio Telescope (GMRT) at 1.28 GHz (n=172),...
VLA Observations of J1228+441, a Luminous Supernova Remnant in NGC 4449 (2007)
Lacey, C. K., Goss, W. M., Mizouni, L. K.
The luminous, oxygen-rich supernova remnant, J1228+441, is located in the irregular galaxy NGC 4449 and has been observed at radio wavelengths for thirty years. An analysis of recent VLA observations...
An H2CO 6 cm maser pinpointing a possible circumstellar torus in IRAS 18566+0408 (2007)
Araya, E., Hofner, P., Sewilo, M., Goss, W. M., Linz, H., Kurtz, S., ...
We report observations of 6 cm, 3.6 cm, 1.3 cm, and 7 mm radio continuum, conducted with the Very Large Array, toward IRAS 18566+0408, one of the few sources known to harbor H2CO 6 cm maser emission....
Araya, E., Hofner, P., Goss, W. M., Linz, H., Kurtz, S., Olmi, L.
We report the results of our second survey for Galactic H2CO maser emission toward young stellar objects. Using the GBT and the VLA in the A configuration we observed 58 star-forming regions and...
Intrinsic short-timescale variability in W3(OH) hydroxyl masers (2006)
Ramachandran, R., Deshpande, A.A., Goss, W.M.
Restricted Access. An open-access version is available at arXiv.org (one of the alternative locations)
The All-Wavelength Extended Groth Strip International Survey (AEGIS) Data Sets (2006)
Davis, M., Guhathakurta, P., Konidaris, N.P., Newman, J.A., Ashby, M.L.N., Biggs, A.D., ...
VLBA Observations of G5.89-0.39: OH masers and magnetic field structure (2006)
Stark, D. P., Goss, W. M., Churchwell, E., Fish, V. L., Hoffman, I. M.
We present VLBA observations of 1667 MHz OH maser emission from the massive star formation region G5.89-0.39. The observations were phase referenced allowing the absolute positions of the masers to...
The Formaldehyde Masers in Sgr B2: Very Long Baseline Array and Very Large Array Observations (2006)
Hoffman, Ian M., Goss, W. M., Palmer, Patrick
Observations of two of the formaldehyde (H2CO) masers (A and D) in Sgr B2 using the VLBA+Y27 (resolution ~0.01") and the VLA (resolution ~9") are presented. The VLBA observations show compact sources...
VLA radio continuum observations of WR ring nebulae (2006)
C. Cappa, S. Pineault, W. M. Goss
VLA radio continuum observations of WR ring nebulae
Observations of neutral and ionized gas of the WR ring nebula NGC 2359 (2006)
V. S. Niemela, C. E. Cappa, W. M. Goss, P. G. Ostrov
Observations of neutral and ionized gas of the WR ring nebula NGC 2359
Intrinsic short time scale variability of W3(OH) maser (2006)
Ramachandran, R., Deshpande, A. A., Goss, W. M.
We have studied the OH masers in the star forming region, W3(OH), with data obtained from the Very Long Baseline Array (VLBA). The data provide an angular resolution of $\sim$5 mas, and a velocity...
Mid-infrared Identification of 6 cm Radio Source Counterparts in the Extended Groth Strip (2006)
Willner, S. P., Coil, A. L., Goss, W. M., Ashby, M. L. N., Barmby, P., ...
A new 6-cm survey of almost 0.6 square degrees to a limit of 0.55-mJy/beam (10-sigma) finds 37 isolated radio sources and 7 radio source pairs (not necessarily physical companions). IRAC counterparts...
The Intrinsic Size of Sagittarius A* from 0.35 cm to 6 cm (2006)
Bower, Geoffrey C., Goss, W. M., Falcke, Heino, Backer, Donald C., Lithwick, Yoram
We present new high-resolution observations of Sagittarius A* at wavelengths of 17.4 to 23.8 cm with the Very Large Array in A configuration with the Pie Town Very Long Baseline Array antenna. We use...
The All-wavelength Extended Groth Strip International Survey (AEGIS) Data Sets (2006)
Davis, M., Guhathakurta, P., Konidaris, N., Newman, J. A., Ashby, M. L. N., Biggs, A. D., ...
In this the first of a series of Letters, we present a description of the panchromatic data sets that have been acquired in the Extended Groth Strip region of the sky. Our survey, the All-wavelength...
Castelletti, G., Dubner, G., Golap, K., Goss, W. M.
In this paper we report on a new study of the SNR Puppis A based on VLA observations at 1425 MHz; the improvement represents a factor of two in angular resolution and almost ten times in sensitivity...
Very large array H53α and H92α line observations of the central region of NGC 253 (2006)
Rodriguez-Rico, C.A., Goss, W.M., Zhao, J.H., Gómez, Y., Anantharamaiah, K.R.
Restricted Access till June 2009 (3 year embargo)
VLA observations of carbon 91α recombination line emission in W49 north (2006)
Roshi, D. Anish, De Pree, C.G., Goss, W.M., Anantharamaiah, K.R.
Restricted Access till June 2009. (3 year embargo)
A New Galactic 6cm Formaldehyde Maser (2006)
Araya, E., Hofner, P., Goss, W. M., Kurtz, S., Linz, H., Olmi, L.
We report the detection of a new H2CO maser in the massive star forming region G23.71-0.20 (IRAS 18324-0820), i.e., the fifth region in the Galaxy where H2CO maser emission has been found. The new...
VLA H53alpha and H92alpha line observations of the central region of NGC 253 (2006)
Rodriguez-Rico, C. A., Goss, W. M., Gomez, Y., Anantharamaiah, K. R.
We present new Very Large Array (VLA) observations toward NGC 253 of the recombination line H53alpha (43 GHz) at an angular resolution of 1.''5 X 1.''0. The free-free emission at 43 GHz is estimated...
VLA Observations of Carbon 91$\alpha$ Recombination Line Emission in W49 North (2006)
Roshi, D. Anish, De Pree, C. G., Goss, W. M., Anantharamaiah, K. R.
We have detected C91$\alpha$ (8.5891 GHz) emission toward 4 ultra-compact \HII regions (\UCHII s; W49G, J, L & C) in the W49 North massive star forming region with the Very Large Array (VLA) at...
Anew galactic 6 cm formaldehyde maser (2006)
Araya, E., Hofner, P., Goss, W. M., Kurtz, S., Linz, H., Olmi, L.
We report the detection of a new H2CO maser in the massive star-forming region G23.71-0.20 (IRAS 18324-0820). This is the fifth region in the Galaxy where H2CO maser emission has been found. The new...
The Detection of 3He+ in a Planetary Nebula Using the VLA (2005)
Balser, Dana S., Goss, W. M., Bania, T. M., Rood, Robert T.
We used the VLA to search for 3He+ emission from two Galactic planetary nebulae (PNe): NGC6572 and J320}. Standard stellar models predict that the 3He/H abundance ratios for PNe should be 1-2 orders...
VLA H53α radio recombination line observations of the ultraluminous infrared galaxy Arp 220 (2005)
Rodriguez-Rico, C.A., Goss, W.M., Viallefond, F., Zhao, J.H., Gómez, Y., Anantharamaiah, K.R.
Restricted Access. An open-access version is available at arXiv.org (one of the alternative locations)
Radio Emission from the Double-Pulsar System J0737-3039 Revisited (2005)
Chatterjee, S., Goss, W. M., Brisken, W. F.
The double pulsar J0737-3039 is the only known system in which the relativistic wind emitted by a radio pulsar demonstrably interacts with the magnetosphere of another one. We report radio...
Pulsar Astrometry at the Microarcsecond Level (2005)
Vlemmings, W. H. T., Chatterjee, S., Brisken, W. F., Lazio, T. J. W., Cordes, J. M., Thorsett, S. E., ...
Determination of pulsar parallaxes and proper motions addresses fundamental astrophysical questions. We have recently finished a VLBI astrometry project to determine the proper motions and parallaxes...
Getting Its Kicks: A VLBA Parallax for the Hyperfast Pulsar B1508+55 (2005)
Chatterjee, S., Vlemmings, W. H. T., Brisken, W. F., Lazio, T. J. W., Cordes, J. M., Goss, W. M., ...
The highest velocity neutron stars establish stringent constraints on natal kicks, asymmetries in supernova core collapse, and the evolution of close binary systems. Here we present the first results...
Lang, Cornelia C., Johnson, Kelsey E., Goss, W. M., Rodriguez, Luis F.
A multi-frequency, multi-configuration study has been made of the compact radio sources in the Galactic Center Quintuplet and Arches stellar clusters using the Very Large Array. Ten radio sources...
A Radio Transient 0.1 pc from Sagittarius A* (2005)
Bower, Geoffrey C., Roberts, Doug A., Yusef-Zadeh, Farhad, Backer, Donald C., Cotton, W. D., Goss, W. M., ...
We report the discovery of a transient radio source 2.7 arcsec (0.1 pc projected distance) South of the Galactic Center massive black hole, Sagittarius A*. The source flared with a peak of at least...
Rodriguez-Rico, C. A., Goss, W. M., Viallefond, F., Gomez, Y., Anantharamaiah, K. R.
We present high angular resolution (0.7'') observations made with the Very Large Array (VLA) of the radio recombination line (RRL) H53alpha and radio continuum emission at 43 GHz from the...
Roshi, D. Anish, Goss, W.M., Anantharamaiah, K.R., Jeyakumar, S.
Restricted Access.
Radio recombination lines from the starburst galaxy NGC 3256 (2005)
Roy, A.L., Goss, W.M., Mohan, Niruj R., Anantharamaiah, K.R.
We have detected the radio recombination lines H91α and H92α with rest frequencies of 8.6 GHz and 8.3 GHz from the starburst nucleus NGC 3256 at an angular resolution of 16.4'' × 9.6'' using the...
Roshi, D. Anish, Balser, Dana S., Bania, T.M., Goss, W.M., De Pree, C.G.
Restricted Access. An open-access version is available at arXiv.org (one of the alternative locations)
Spatial and Temporal Variations in Small-Scale Galactic HI Structure Toward 3C~138 (2005)
Brogan, C. L., Zauderer, B. A., Lazio, T. J., Goss, W. M., De Pree, C. D., Fasion, M. D.
We present three epochs of VLBA observations of Galactic HI absorption toward the quasar 3C~138 with resolutions of 20 mas (~ 10 AU). This analysis includes VLBA data from observations in 1999 and...
VLA observations of broad 6-cm excited state OH lines in W49A (2005)
Using the Very Large Array (VLA), we observed all three of the 6-cm lines of the doublet Pi 1/2, J=1/2 state of OH with sub-arcsecond resolution (about 0.4 arcsec) in W49A. While the spatial...
Simultaneous Multi-Wavelength Observations of Sgr A* (2005)
An, T., Goss, W. M., Hong, X. Y., Roy, S., Rao, A. P., ...
We observed Sgr A* using the Very Large Array (VLA) and the Giant Metrewave Radio Telescope (GMRT) at multiple cm and mm wavelengths on 17 June 2003. The measured flux densities of Sgr A*, together...
The OH (1720 MHz) Supernova Remnant Masers in W44: MERLIN and VLBA Polarization Observations (2005)
Hoffman, Ian M., Goss, W. M., Brogan, C. L., Claussen, M. J.
Full-polarization MERLIN and VLBA observations of the 1720-MHz maser emission from the OH molecule in the supernova remnant W44 are presented. Zeeman splitting has been directly resolved between...
Roshi, D. Anish, Goss, W. M., Anantharamaiah, K. R., Jeyakumar, S.
Using the Very Large Array (VLA) the C76$\alpha$ and C53$\alpha$ recombination lines (RLs) have been detected toward the ultra-compact \HII\ region (UCHII region) G35.20$-$1.74. We also obtained...
Multi-density model of the ionised gas in NGC 253 using radio recombination lines (2005)
Mohan, Niruj R., Goss, W.M., Anantharamaiah, K.R.
We have imaged the H92α (8.3 GHz), H75α (15 GHz), and H166α (1.4 GHz) Radio Recombination Lines (RRLs) from NGC 253 at resolutions of 4.5 pc (0.4'') , 2.5 pc (0.2'') and 53 pc (4.5'')...
Multi-density model of the ionised gas in NGC 253 using radio recombination lines (2005)
Mohan, Niruj R., Goss, W.M., Anantharamaiah, K.R.
We have imaged the H92α (8.3 GHz), H75α (15 GHz), and H166α (1.4 GHz) Radio Recombination Lines (RRLs) from NGC 253 at resolutions of 4.5 pc (0.4'') , 2.5 pc (0.2'') and 53 pc (4.5'')...
Radio Recombination Lines from the Starburst Galaxy NGC 3256 (2005)
Roy, A. L., Goss, W. M., Mohan, Niruj R., Anantharamaiah, K. R.
We have detected the radio recombination lines H91-alpha and H92-alpha with rest frequencies of 8.6 GHz and 8.3 GHz from the starburst nucleus NGC 3256 at an angular resolution of 16.4" x 9.6" using...
Roshi, D. Anish, Balser, Dana. S., Bania, T. M., Goss, W. M., De Pree, C. G.
We report here on a survey of carbon recombination lines (RLs) near 8.5 GHz toward 17 ultra-compact \HII regions (\UCHII s). Carbon RLs are detected in 11 directions, indicating the presence of dense...
Radio recombination lines from starbursts : NGC 3256, NGC 4945 and the Circinus galaxy (2005)
Roy, A. L., Goss, W. M., Mohan, N. R., Oosterloo, T., Anantharamaiah, K. R.
Radio recombination lines from the starburst galaxy NGC 3256 (2005)
Roy, A. L., Goss, W. M., Mohan, N. R., Anantharamaiah, K. R.
The simultaneous VLA observations of Sgr A* from 90 to 0.7 cm (2004)
An, T., Goss, W. M., Roy, S., ...
We present a spectrum of Sgr A* observed simultaneously on June 17, 2003 at wavelengths from 90 to 0.7 cm with the VLA. In the spectrum, we also include the measurements of Sgr A* observed on the...
Very large array H92α and H53α radio recombination line observations of M82 (2004)
Rodriguez-Rico, C.A., Viallefond, F., Zhao, J.H., Goss, W.M., Anantharamaiah, K.R.
Restricted Access. An open-access version is available at arXiv.org (one of the alternative locations)
Protostars and Outflows in the NGC7538 - IRS9 Cloud Core (2004)
Sandell, G., Goss, W. M., Wright, M.
New high resolution observations of HCO+ J=1-0, H13CN J=1-0, SO 2,2 - 1,1, and continuum with BIMA at 3.4 mm show that the NGC7538 - IRS9 cloud core is a site of active ongoing star formation. Our...
Radio Recombination Lines from Starbursts: NGC 3256, NGC 4945 and the Circinus Galaxy (2004)
Roy, A. L., Goss, W. M., Mohan, Niruj R., Oosterloo, T., Anantharamaiah, K. R.
A renewed attempt to detect radio recombination lines from external galaxies has resulted in the measurement of lines from several bright starburst galaxies. The lines are produced by hydrogen...
Multi-density model of the ionised gas in NGC 253 using radio recombination lines (2004)
Mohan, Niruj R., Goss, W. M., Anantharamaiah, K. R.
We have imaged the H92alpha (8.3 GHz), H75alpha (15 GHz), and H166alpha (1.4 GHz) Radio Recombination Lines (RRLs) from NGC 253 at resolutions of 4.5 pc (0.4"), 2.5 pc (0.2") and 53 pc (4.5")...
The OH (1720 MHz) Supernova Remnant Masers in W28: MERLIN and VLBA Polarization Observations (2004)
Hoffman, Ian M., Goss, W. M., Brogan, C. L., Claussen, M. J.
Full-polarization MERLIN and VLBA observations of the 1720 MHz maser emission from the OH molecule in the supernova remnant W28 are presented. Zeeman splitting (|B| \approx 0.75 mG) has been directly...
The neutral gas in the environs of the Geminga gamma-ray pulsar (2004)
Giacani, E., Reynoso, E., Dubner, G., Goss, W. M., Green, A., Johnston, S.
We present a high-resolution (24 arcsec) study of the HI interstellar gas distribution around the radio-quiet neutron star Geminga. Based on Very Large Array (VLA) and MPIfR Effelsberg telescope...
On the Origin of the Wide HI Absorption Line Toward Sgr A* (2004)
Dwarakanath, K. S., Goss, W. M., Zhao, J. H., Lang, C. C.
We have imaged a region of about 5' extent surrounding Sgr A* in the HI 21 cm-line absorption using the Very Large Array. A Gaussian decomposition of the optical depth spectra at positions within...
VLA H92 Alpha and H53 Alpha Radio Recombination Line Observations of M82 (2004)
Rodriguez-Rico, C. A., Viallefond, F., Goss, W. M., Anantharamaiah, K. R.
We present high angular resolution (0.6'') observations made with the VLA of the radio continuum at 8.3 and 43 GHz as well as H92 Alpha and H53 Alpha radio recombination lines from the nearby (3 Mpc)...
Water Masers in W49 North and Sagittarius B2 (2004)
McGrath, E. J., Goss, W. M., De Pree, C. G.
Using the Very Large Array (VLA) of the National Radio Astronomy Observatory in the A and B configurations, we have obtained simultaneous high resolution observations of both the 22 GHz water maser...
OH (1720 MHz) Maser Search Toward the Large Magellanic Cloud (2004)
Brogan, C. L., Goss, W. M., Lazendic, J., Green, A. J.
We have carried out a sensitive search for OH (1720 MHz) masers in the Large Magellanic Cloud (LMC) toward five regions using the Australia Telescope Compact Array (ATCA). Our source list includes...
Bower, Geoffrey C., Falcke, Heino, Herrnstein, Robeson M., Zhao, Jun-Hui, Goss, W. M., Backer, Donald C.
We have detected the intrinsic size of Sagittarius A*, the Galactic Center radio source associated with a supermassive black hole, showing that the short-wavelength radio emission arises from very...
The Variability of Sagittarius A* at Centimeter Wavelengths (2004)
Herrnstein, R. M., Bower, G. C., Goss, W. M.
We present the results of a 3.3-year project to monitor the flux density of Sagittarius A* at 2.0, 1.3, and 0.7 cm with the VLA. The fully calibrated light curves for Sgr A* at all three wavelengths...
A Very Large Array 3.6cm continuum survey of Galactic Wolf-Rayet stars (2004)
Cappa, C., Goss, W. M., Van Der Hucht, K. A.
We report the results of a survey of radio continuum emission of Galactic Wolf-Rayet stars north of declination -46 degrees. The observations were obtained at 8.46 GHz (3.6cm) using the Very Large...
A Radio Outburst Nearly Coincident with the Large X-ray Flare from Sgr A* on 2002-10-03 (2004)
Zhao, Jun-Hui, Herrnstein, R. M., Bower, G. C., Goss, W. M., Liu, S. M.
A large radio outburst from Sgr A* was observed during the VLA weekly monitoring program at 2 cm, 1.3 cm and 7 mm, nearly coincident with the brightest X-ray flare detected to date with the...
A Very Large Array 3.6 Centimeter Continuum Survey of Galactic Wolf-Rayet Stars (2004)
We report the results of a survey of radio continuum emission of Galactic Wolf-Rayet (WR) stars north of delta=-46?. The observations were obtained at 8.46 GHz (3.6 cm) using the Very Large Array,...
On the origin of the wide HI absorption line towards Sgr A* (2004)
Dwarakanath, K.S., Goss, W.M., Zhao, J.H., Lang, C.C.
We have imaged a region of ~5 extent surrounding Sgr A* in the HI 21 cm-line absorption using the Very Large Array. A Gaussian decomposition of the optical depth spectra at positions within ~2(~5...
Detection of the intrinsic size of Sagittarius A* through closure amplitude imaging (2004)
Bower, G. C., Falcke, H., Herrnstein, R. M., Zhao, J. H., Goss, W. M., Backer, D. C.
Detection of Sagittarius A* at 330 MHz with the Very Large Array (2003)
Nord, Michael E., Lazio, T. Joseph W., Kassim, Namir E., Goss, W. M., Duric, N.
We report the detection of Sagittarius A*, the radio source associated with our Galaxy's central massive black hole, at 330 MHz with the Very Large Array. Implications for the spectrum and emission...
Pulsar Parallaxes at 5 GHz with the Very Long Baseline Array (2003)
Chatterjee, S., Cordes, J. M., Vlemmings, W. H. T., Arzoumanian, Z., Goss, W. M., Lazio, T. J. W.
We present the first pulsar parallaxes measured with phase-referenced pulsar VLBI observations at 5 GHz. Due to the steep spectra of pulsars, previous astrometric measurements have been at lower...
Broad Recombination Line Objects in W49N on 600 AU Scales (2003)
De Pree, C. G., Wilner, D. J., Mercer, A. J., Davis, L. E., Goss, W. M., Kurtz, S.
High resolution 7 mm observations of the W49N massive star forming region have detected recombination line emission from the individual ultracompact (UC) HII regions on 50 milliarcsecond (600 AU)...
Imprints of neutron stars in the interstellar medium (2003)
Reynoso, E. M., Johnston, S., Green, A. J., Goss, W. M., Dubner, G. M., Giacani, E. B.
We have carried out an HI survey towards X-ray central compact objects (CCOs) inside supernova remnants (SNRs) which shows that many of them are placed within local HI minima. The nature of these...
New high-resolution radio observations of the SNR CTB 80 (2003)
Castelleti, G., Dubner, G., Golap, K., Goss, W. M., Velazquez, P. F., Holdaway, M., ...
We report new high resolution and high sensitivity radio observations of the extended supernova remnant (SNR) CTB 80 (G69.0+2.7) at 240 MHz, 324 MHz, 618 MHz, and 1380 MHz. The imaging of CTB 80 at...
VLA observations of 6-cm excited OH (2003)
Palmer, Patrick, Goss, W. M., Whiteoak, J. B.
The VLA was used to determine precise positions for 4765-MHz OH maser emission sources toward star-forming regions which had been observed about seven months earlier with the Effelsberg 100-meter...
Influence of the neutron star 1E 161348-5055 in RCW 103 on the surrounding medium (2003)
Reynoso, E. M., Green, A. J., Johnston, S., Goss, W. M., Dubner, G. M., Giacani, E. B.
We have carried out a study of the neutral hydrogen in the direction of the X-ray source 1E 161348-5055, a compact central object (CCO) located in the interior of the supernova remnant (SNR) RCW 103....
Proper-Motion Measurements with the VLA. II. Observations of Twenty-eight Pulsars (2003)
Brisken, W. F., Fruchter, A. S., Goss, W. M., Herrnstein, R. S., Thorsett, S. E.
Using the Very Large Array, we have measured the proper motions of twenty-eight radio pulsars. On average, the pulsars studied are fainter and more distant than those studied in earlier work,...
Phase-Referenced VLBA Observations of OH Masers at 4765 MHz (2003)
Palmer, Patrick, Goss, W. M., Devine, K. E.
We report VLBA observations of maser emission from the rotationally excited doublet Pi 1/2, J=1/2 state of OH at 4765 MHz. We made phase-referenced observations of W3(OH) at both 4765 MHz and 1720...
The Formaldehyde Masers in NGC 7538 and G29.96-0.02: VLBA, MERLIN, and VLA Observations (2003)
Hoffman, Ian M., Goss, W. M., Palmer, Patrick, Richards, A. M. S.
The 6 cm formaldehyde (H2CO) maser sources in the compact HII regions NGC 7538-IRS1 and G29.96-0.02 have been imaged at high resolution (beams < 50 mas). Using the VLBA and MERLIN, we find the...
Reynoso, E. M., Green, A. J., Johnston, S., Dubner, G. M., Giacani, E. B., Goss, W. M.
We have observed the HI distribution in an area 40' x 40' around the neutron star candidate RX J0822-4300, which is located in the supernova remnant Puppis A. The observations of the 21 cm line were...
Thorsett, S. E., Benjamin, R. A., Brisken, Walter F., Golden, A., Goss, W. M.
The Monogem ring is a bright, diffuse, 25-degree-diameter supernova remnant easily visible in soft X-ray images of the sky. Projected within the ring is a young radio pulsar, PSR B0656+14. An...
The distance and radius of the neutron star PSR B0656+14 (2003)
Brisken, W. F., Thorsett, S. E., Golden, A., Goss, W. M.
We present the result of astrometric observations of the radio pulsar PSR B0656+14, made using the Very Long Baseline Array. The parallax of the pulsar is pi = 3.47 +- 0.36 mas, yielding a distance...
The Discovery of Sgr A* (2003)
Goss, W. M., Brown, Robert L., Lo, K. Y.
The compact radio source Sgr A* is associated with a 3.6 million black hole at the center of the Milky Way. The radio source was discovered in February 1974 by Bruce Balick and Robert L.Brown. The...
Variability of Sagittarius A* - Flares at 1 Millimeter (2003)
Zhao, Jun-Hui, Young, K. H., Herrnstein, R. M., Ho, P. T. P., Tsutsumi, T., Lo, K. Y., ...
We report the results from recent observations of Sgr A* at short-/sub-millimeter wavelengths made with the partially finished Sub-Millimeter Array (SMA) on Mauna Kea. A total of 25 epochs of...
PKS B1400-33: an unusual radio relic in a poor cluster (2002)
Subrahmanyan, R., Beasley, A. J., Goss, W. M., Golap, K., Hunstead, R. W.
We present new arcminute resolution radio images of the low surface brightness radio source PKS B1400-33 that is located in the poor cluster Abell S753. The observations consist of 330 MHz VLA, 843...
VLA Observations of the "Eye of the Tornado"- the High Velocity \HII Region G357.63-0.06 (2002)
The unusual supernova remnant candidate G357.7-0.1 and the compact source G357.63-0.06 have been observed with the Very Large Array at 1.4 and 8.3 GHz. The H92$\alpha$ line (8.3 GHz) was detected...
The Sizes of OH (1720 MHz) Supernova Remnant Masers: MERLIN and VLBA Observations of IC443 (2002)
Hoffman, Ian M., Goss, W. M., Brogan, C. L., Claussen, M. J, Richards, A. M. S.
MERLIN and VLBA observations of the 1720 MHz maser emission from the OH molecule in the supernova remnant IC443 are presented. Based on MERLIN data with a resolution of 160 mas, the deconvolved sizes...
Lang, Cornelia C., Goss, W. M., Morris, Mark
The Owens Valley Radio Observatory (OVRO) millimeter array was used to make observations of the CS(2-1) line (at 97.981 GHz) arising from the G0.07+0.04 region of the ``-30 km/s'' molecular cloud...
Mohan, Niruj R., Anantharamaiah, K.R., Goss, W.M.
We have imaged the H92α and H75α radio recombination line (RRL) emissions from the starburst galaxy NGC 253 with a resolution of ~4 pc. The peak of the RRL emission at both frequencies coincides...
Claussen, M. J., Goss, W. M., Desai, K. M., Brogan, C. L.
We have used the NRAO Very Large Array (VLA) in conjunction with the Very Long Baseline Array (VLBA) Pie Town antenna as a real-time interferometer system to measure the size of the extragalactic...
Decapitating the Duck: The (non)association of PSR B1757-24 and supernova remnant G5.4-1.2 (2002)
Thorsett, S. E., Brisken, W. F., Goss, W. M.
We have made the first direct interferometric proper motion measurements of the radio pulsar B1757-24, which sits at the tip of the "beak" of the putative "Duck" supernova remnant. The peculiar...
VLBA Measurement of Nine Pulsar Parallaxes (2002)
Brisken, Walter F., Benson, John M., Goss, W. M., Thorsett, S. E.
We determined the distances to nine pulsars by parallax measurements using the NRAO Very Long Baseline Array, doubling the number of pulsars with accurate distance measurements. Broadband phase...
VLA Observations of H I in the Helix Nebula (NGC 7293) (2002)
Rodriguez, Luis F., Goss, W. M., Williams, Robert
We report the detection of 21-cm line emission from H I in the planetary nebula NGC 7293 (the Helix). The observations, made with the Very Large Array, show the presence of a ring of atomic hydrogen...
Mohan, Niruj R., Anantharamaiah, K. R., Goss, W. M.
We have imaged the H92alpha and H75alpha radio recombination line (RRL) emissions from the starburst galaxy NGC 253 with a resolution of ~4 pc. The peak of the RRL emission at both frequencies...
Verkhodanov, O. V., Parijskij, Yu. N., Soboleva, N. S., Kopylov, A. I., Temirova, A. V., Zhelenkova, O. P., ...
BVRI data for the majority of the objects of the RC catalogue with steep spectra and $m_R
Dwarakanath, K.S., Carilli, C.L., Goss, W.M.
Using the Westerbork Synthesis Radio Telescope, we have detected H I 21 cm line absorption in the warm neutral medium of the Galaxy toward the extragalactic source 3C 147. This absorption, at a local...
VLA observations of the Galactic Centre at 74 MHz (2002)
Anantharamaiah, K. R., Kassim, N. E., Lazio, T. J. W., Goss, W. M., Falcke, H.
Search for radio recombination lines towards the gravitational lens PKS1830-211 (2002)
Mohan, Niruj R., Anantharamaiah, K.R., Goss, W.M.
Restricted Access. An open access version is available at NASA ADS (alternative location). The Universe at Low Radio Frequencies, Proceedings of IAU Symposium 199, held 30 Nov - 4 Dec 1999, Pune,...
Radio recombination lines from starburst galaxies: High and low density ionized gas (2002)
Mohan, Niruj R., Anantharamaiah, K.R., Goss, W.M.
Restricted Access. The Universe at Low Radio Frequencies, Proceedings of IAU Symposium 199, held 30 Nov - 4 Dec 1999, Pune, India. Eds. A. Pramesh Rao, G. Swarup, and Gopal-Krishna, 2002.
VLA observations of the galactic center at 74 MHz (2002)
Anantharamaiah, K.R., Kassim, N.E., Lazio, T.J.W., Goss, W.M., Falcke, H.
Restricted Access. The Universe at Low Radio Frequencies, Proceedings of IAU Symposium 199, held 30 Nov - 4 Dec 1999, Pune, India. Eds. A. Pramesh Rao, G. Swarup, and Gopal-Krishna, 2002.
Photometric study of radio galaxies in RATAN--600 "Cold" survey (2001)
Verkhodanov, O. V., Parijskij, Yu. N., Soboleva, N. S., Kopylov, A. I., Temirova, A. V., Zhelenkova, O. P., ...
About 100 steep spectrum radio sources from the RATAN--600 RC catalog were mapped by the VLA and identified with optical objects down to 24$^m$--25$^m$ in the R band using the 6 m telescope. An...
Environs of Bilateral Supernova Remnants with Neutron Stars (2001)
Dubner, G., Giacani, E., Gaensler, B. M., Goss, W. M., Green, A. J.
We report on Australia Telescope Compact Array (ATCA) HI observations carried out in the direction of bilateral supernova remnants (SNRs) with associated neutron stars: G296.5+10.0 and G320.4--1.2,...
Dwarakanath, K. S., Carilli, C. L., Goss, W. M.
Using the Westerbork Synthesis Radio Telescope, we have detected HI 21 cm-line absorption in the Warm Neutral Medium of the Galaxy toward the extragalactic source 3C147. This absorption, at an LSR...
The Interstellar Medium around the Supernova Remnant G320.4-1.2 (2001)
Dubner, G. M., Gaensler, B. M., Giacani, E. B., Goss, W. M., Green, A. J.
Using the Australia Telescope Compact Array, we have carried out a survey of the HI emission in the direction of the ``barrel-shaped'' supernova remnant (SNR) G320.4-1.2 (MSH 15-52) and its...
Mohan, Niruj R., Anantharamaiah, K.R., Goss, W.M.
We have detected the H92α radio recombination line from two dwarf starburst galaxies, NGC 5253 and He 2-10, using the Very Large Array. Both the line data as well as the radio continuum data are...
The Radio Recovery of SN 1970G: The Continuing Radio Evolution of SN 1970G (2001)
Stockdale, Christopher J., Goss, W. M., Cowan, John J., Sramek, R. A.
Using the Very Large Array, we have detected radio emission from the site of SN 1970G in the Sc galaxy M101. These observations are 31 years after the supernova event, making SN 1970G the longest...
Mohan, Niruj R., Anantharamaiah, K. R., Goss, W. M.
We have detected the H92alpha radio recombination line from two dwarf starburst galaxies, NGC 5253 and He 2-10, using the Very Large Array. Both the line data as well as the radio continuum data are...
Lozinskaya, T. A., Moiseev, A. V., Afanasiev, V. L., Wilcots, E., Goss, W. M.
Observations of the nebula S3 associated with the WO star in the galaxy IC 1613 and of an extended region surrounding S3 are reported. The star and bright core of the nebula were observed with a...
Lang, Cornelia C., Goss, W. M., Rodriguez, Luis F.
The Galactic center Arches stellar cluster, detected and studied until now only in the near-infrared, is comprised of at least one hundred massive (M>20 Msun) stars. Here we report the detection at...
Pulsar wind nebulae around the southern pulsars PSR B1643-43 and PSR B1706-44 (2001)
Giacani, E., Frail, D. A., Goss, W. M., Vieytes, M.
We present high resolution VLA images taken at the wavelengths of lambda 20 cm, lambda 6 cm, and lambda 3.6 cm in the vicinity of the pulsars PSR B1706-44 (PSR J1709-4428) and PSR B1643-43 (PSR...
A VLA H92alpha Study of the Arched Filament Complex Near the Galactic Center (2001)
Lang, Cornelia C., Goss, W. M., Morris, Mark
The VLA has been used at 8.3 GHz in the DnC and CnB array configurations to carry out an H92alpha recombination line study (at 8.3 GHz) of the ionized gas in the Arched Filaments H II complex, which...
A sub-arcsecond study of ionized gas in NGC 253 (2001)
Anantharamaiah, K.R., Mohan, Niruj R., Goss, W.M.
Open Access. Galaxies and their Constituents at the Highest Angular Resolutions, Proceedings of IAU Symposium #205, held 15-18 August 2000 at Manchester, United Kingdom. Ed. R. T. Schilizzi, 2001.
High velocity ionized component - A counter-rotating circumnuclear disk in NGC 253 (2001)
Zhao, J., Goss, W.M., Ulvestad, J.S., Anantharamaiah, K.R.
Restricted Access. Gas and Galaxy Evolution, ASP Conference Proceedings, Vol. 240. Eds. John E. Hibbard, Michael Rupen, and Jacqueline H. van Gorkom. San Francisco: Astronomical Society of the...
Observations of neutral and ionized gas of the WR ring nebula NGC 2359 (2001)
Cappa , C. E., Goss , W. M., Niemela , V. S., Ostrov , P. G.
We investigated the distribution of neutral and ionized material in the region of NGC 2359, the optical nebular ring around the Wolf-Rayet star HD56925. We used 21cm line and 20cm continuum radio...
The Structure of the Cold Neutral ISM on 10-100 Astronomical Unit Scales (2000)
We have used the Very Long Baseline Array (VLBA) and the Very Large Array (VLA) to image Galactic neutral hydrogen in absorption towards four compact extragalactic radio sources with 10...
Radio Variability of Sagittarius A* - A 106 Day Cycle (2000)
Zhao, Jun-Hui, Bower, G. C., Goss, W. M.
We report the presence of a 106-day cycle in the radio variability of Sgr A* based on an analysis of data observed with the Very Large Array (VLA) over the past 20 years. The pulsed signal is most...
Deshpande, A.A., Dwarakanath, K.S., Goss, W.M.
We have obtained the power spectral description of the density and opacity fluctuations of the cold H I gas in the Galaxy toward Cas A and Cygnus A. We have employed a method of deconvolution, based...
Proper Motion Measurements with the VLA: I. Wide-field Imaging and Pulse Gating Techniques (2000)
McGary, R. S., Brisken, W. F., Fruchter, A. S., Goss, W. M., Thorsett, S. E.
The pulsar velocity distribution provides information about the binary history of pulsar progenitors as well as asymmetries of the supernova events in which pulsars are born. Studies of local pulsars...
Parallax and Kinematics of PSR B0919+06 from VLBA Astrometry and Interstellar Scintillometry (2000)
Chatterjee, S, Cordes, J M, Lazio, T J W, Goss, W M, Fomalont, E B, Benson, J M
Results are presented from a long-term astrometry program on PSR B0919+06 using the NRAO Very Long Baseline Array. With ten observations (seven epochs) between 1994--2000, we measure a proper motion...
Parallax and Kinematics of PSR B0919+06 from VLBA Astrometry and Interstellar Scintillometry (2000)
Chatterjee, S., Cordes, J. M., Lazio, T. J. W., Goss, W. M., Fomalont, E. B., Benson, J. M.
Results are presented from a long-term astrometry program on PSR B0919+06 using the NRAO Very Long Baseline Array. With ten observations (seven epochs) between 1994--2000, we measure a proper motion...
Parallax and Kinematics of PSR B0919+06 from VLBA Astrometry and Interstellar Scintillometry (2000)
Chatterjee, S, Cordes, J M, Lazio, T J W, Goss, W M, Fomalont, E B, Benson, J M
Results are presented from a long-term astrometry program on PSR B0919+06 using the NRAO Very Long Baseline Array. With ten observations (seven epochs) between 1994--2000, we measure a proper motion...
Dickel, H. R., Goss, W. M., De Pree, C. G.
Absorption in the J{K-K+} = 2{11}-2{12} transition of formaldehyde at 2 cm towards the ultracompact HII regions C1 and C2 of W 58 has been observed with the VLA with an angular resolution of ~0.2''...
Power Spectrum of the density of cold atomic gas in the Galaxy towards Cas A and Cygnus A (2000)
Deshpande, A. A., Dwarakanath, K. S., Goss, W. M.
We have obtained the power spectral description of the density and opacity fluctuations of the cold HI gas in the Galaxy towards Cas A, and Cygnus A. We have employed a method of deconvolution, based...
Anantharamaiah, K.R., Viallefond, F., Mohan, Niruj R., Goss, W.M., Zhao, J.H.
We present observations of radio recombination lines (RRL) from the starburst galaxy Arp 220 at 8.1 GHz (H92α) and 1.4 GHz (H167α and H165α) and at 84 GHz (H42α), 96 GHz (H40α) and 207 GHz...
The location of the dense and ionized gas in the NGC 2023 PDR (2000)
Wyrowski, F., Walmsley, C. M., Goss, W. M.
The VLA and the BIMA array were used to obtain high resolution (10-20") observations of C+, traced by the C91a recombination line at 8.6 GHz, and the dense molecular gas, traced by HCN and HCO+(1-0),...
Measurement of the Parallax of PSR B0950+08 Using the VLBA (2000)
Brisken, Walter F., Benson, John M., Beasley, A. J., Fomalont, Edward B., Goss, W. M., Thorsett, S. E.
A new technique has been developed to remove the ionosphere's distorting effects from low frequency VLBI data. By fitting dispersive and non-dispersive components to the phases of multi-frequency...
RATAN-600 - VLA - BTA-6m ("BIG TRIO") Project: multicolour studying of distant radio galaxies (2000)
Parijskij, Yu. N., Goss, W. M., Kopylov, A. I., Soboleva, N. S., Temirova, A. V., Verkhodanov, O. V., ...
Powerful radio galaxies belong to the population of massive stellar systems that can be picked at high redshifts. With measured redshift, morphology and age determination these objects can help...
Search for radio recombination lines towards the gravitational lens PKS 1830-211 (2000)
Mohan, Niruj R., Anantharamaiah, K. R., Goss, W. M.
A search for radio recombination lines near 20 cm at z=0.193 and z=0.886 towards the gravitational lens system PKS 1830-211 has yielded upper limits on the line optical depth of 5 x 10^{-5} and 5...
Anantharamaiah, K. R., Viallefond, F., Mohan, Niruj R., Goss, W. M., Zhao, J. H.
We present observations of radio recombination lines from the starburst galaxy Arp 220 at 1.4, 8.1, 84, 96 and 207 GHz (sensitive upper limit for the 1.4 GHz line and firm detections at the other...
Radio recombination lines from starburst galaxies : high and low density ionized gas (2000)
Mohan, Niruj R., Anantharamaiah, K. R., Goss, W. M.
Radio recombination lines (RRL) at 8 GHz and 15 GHz detected from four starburst galaxies are shown to arise in compact high density HII regions, which are undetectable below ~4 GHz. Detection of an...
OH Zeeman Magnetic Field Detections Toward Five Supernova Remnants Using the VLA (2000)
Brogan, C. L., Frail, D. A., Goss, W. M., Troland, T. H.
We have observed the OH (1720 MHz) line in five galactic SNRs with the VLA to measure their magnetic field strengths using the Zeeman effect. We detected all 12 of the bright ($S_{\nu} > 200$ mJy) OH...
Thomas G. Pannuti, Christina K. Lacey, W. M. Goss, Charles G. Hoopes, Marcus A. Magnor
We have conducted a multiwavelength (X-ray, optical, and radio) search for supernova remnants (SNRs) in the nearby Sculptor Group Sd galaxy NGC 300. Our Very Large Array (VLA) radio observations at 6...
Deep Radio Imaging of Globular Clusters and the Cluster Pulsar Population (1999)
We have obtained deep multifrequency radio observations of seven globular clusters using the Very Large Array and the Australia Telescope Compact Array. Five of these, NGC 6440, NGC 6539, NGC 6544,...
Parijskij, Yu. N., Goss, W. M., Verkhodanov, O. V., Kopylov, A. I., Soboleva, N. S., Temirova, A. V.
VLA maps obtained at 1.4 GHz with a resolution of 2\farcs5$\times$2\arcsec for three sources and 6\farcs5$\times$2\farcs3 for two sources detected in the RATAN-600 Zenith survey of 1988 have been...
Yusef-Zadeh, F., Goss, W. M., Roberts, D. A., Robinson, B., Frail, D. A.
A survey of the inner 8$^\circ \times 1^\circ$ of the Galactic plane toward the Galactic center has been carried out at the 1720 MHz transition of OH molecule using the VLA in its D configuration...
Lang, Cornelia C., Figer, Don F., Goss, W. M., Morris, Mark
VLA images of the Sickle and Pistol H II regions near the Galactic center at 3.6 and 6 cm reveal six point sources in the region where the dense Quintuplet stellar cluster is located. The spectral...
Infrared Candidates for the Intense Galactic X-ray Source GX 17+2 (1999)
Deutsch, Eric W., Margon, Bruce, Anderson, Scott F., Wachter, Stefanie, Goss, W. M.
We present new astrometric solutions and infrared Hubble Space Telescope observations of GX 17+2 (X1813-140), one of the brightest X-ray sources on the celestial sphere. Despite 30 years of intensive...
Claussen, M. J., Goss, W. M., Frail, D. A., Desai, K.
We have used the NRAO Very Long Baseline Array (VLBA) to image OH(1720 MHz) masers in the supernova remnants W28 and W44 at a resolution of 40 mas. We also used MERLIN to observe the same OH(1720...
Lazio, T.J.W., Anantharamaiah, K.R., Goss, W.M., Kassim, N.E., Cordes, J.M.
G359.87+0.18 is an enigmatic object located 15' from Sgr A*. It has been variously classified as an extragalactic source, a Galactic jet source, and a young supernova remnant. We present new...
De Pree, C. G., Nysewander, M., Goss, W. M.
NGC 3576 (G291.28-0.71; l=291.3o, b=-0.7o) and NGC 3603 (G291.58-0.43; l=291.6o, b=-0.5o) are optically visible, luminous HII regions located at distances of 3.0 kpc and 6.1 kpc, respectively. We...
Discovery of a New Filamentary Structure near the Galactic Center: G358.85+0.47 - The Pelican (1999)
Anantharamaiah, K. R., Lang, C. C., Kassim, N. E., Lazio, T. J. W., Goss, W. M.
We report the discovery of a new filamentary structure, G358.85+0.47, consisting of at least three mutually parallel but bent `strands', located about 1.5 degrees SW of the Sgr A complex. Unlike all...
Anantharamaiah, K. R., Pedlar, A., Goss, W. M.
Radio recombination lines at a wavelength of 20 cm reveals the presence of an extended component of ionized gas of lower density in the Sgr A complex. This component extends well beyond the thermal...
Sub-Milliarcsecond Precision of Pulsar Motions: Using In-Beam Calibrators with the VLBA (1999)
Fomalont, E. B., Goss, W. M., Beasley, A. J., Chatterjee, S.
We present Very Long Baseline Array phase-referenced measurements of the parallax and proper motion of two pulsars, B0919+06 and B1857-26. Sub-milliarcsecond positional accuracy was obtained by...
Discovery of a new filamentary structure G358.85+0.47 -- The Pelican (1999)
Anantharamaiah, K.R., Lang, C.C., Kassim, N.E., Lazio, T.J.W., Goss, W.M.
Restricted Access. The Central Parsecs of the Galaxy, ASP Conference Series, Vol. 186. Eds. Heino Falcke, Angela Cotera, Wolfgang J. Duschl, Fulvio Melia, and Marcia J. Rieke, 1999.
Ionized gas in the Sgr A complex -- VLA observations of H168α and H270α recombination lines (1999)
Anantharamaiah, K.R., Pedlar, A., Goss, W.M.
Restricted Access. An open-access version is available at arXiv.org (one of the alternative locations).
Hyperstrong radio-wave scattering and free electrons in the galactic center (1999)
Lazio, T.J.W., Cordes, J.M., Anantharamaiah, K.R., Goss, W.M., Kassim, N.E.
Restricted Access. The Central Parsecs of the Galaxy, ASP Conference Series, Vol. 186. Eds. Heino Falcke, Angela Cotera, Wolfgang J. Duschl, Fulvio Melia, and Marcia J. Rieke, 1999.
Lazio, T. Joseph W., Anantharamaiah, K. R., Goss, W. M., Kassim, Namir E., Cordes, James M.
G359.87+0.18 is an enigmatic object located 15' from Sgr A*. It has been variously classified as an extragalactic source, Galactic jet source, and young supernova remnant. We present new observations...
Accurate Positions of OH Emission Sources at 1665 and 1667 MHz, (1998)
Goss,W. M., Lockhard,I. A., Fomalont,E. B., Hardebeck,Ellen G.
Accurate positions of 8 OH emission sources have been measured at 1665 and 1667 MHz. The Owens Valley interferometer was used at spacings of 366 and 488 m north-south. Near the continuum sources...
High-resolution Observations of OH(1720 MHz) Masers Toward the Galactic Center (1998)
Yusef-Zadeh, F., Roberts, D. A., Goss, W. M., Frail, D. A., Green, A. J.
High-resolution VLA observations of 1720 MHz OH maser emission from Sgr A East and the circumnuclear disk with spatial and spectral resolutions of $\approx$ 2\dasec5 $\times$ 1\dasec3 and 0.27 \kms...
VLA observations of hydrogen and carbon recombination lines toward W3A at 1.4 GHz. (1998)
Kantharia, N.G., Anantharamaiah, K.R., Goss, W.M.
We present high-sensitivity, high-resolution VLA observations of the W3 complex of H II regions in the 168 alpha recombination lines of hydrogen, carbon, and sulphur. The H 168 alpha line from W3A...
Detection of H I 21 centimeter absorption by the warm neutral medium (1998)
Carilli, C.L., Dwarakanath, K.S., Goss, W.M.
We have detected H I 21 cm line absorption by the warm neutral medium (WNM) using the Westerbork synthesis radio telescope. The absorption was detected toward Cygnus A at LSR velocities of -40 and...
Koralesky, Barron, Frail, D. A., Goss, W. M., Claussen, M. J., Green, A. J.
We present the results of VLA observations in the ground-state hydroxyl (OH) transition at 1720 MHz toward 20 supernova remnants (SNRs). We detect compact emission from four objects. For three of...
Detection of HI 21cm Absorption by the Warm Neutral Medium (1998)
Carilli, C. L., Dwarakanath, K. S., Goss, W. M.
We have detected HI 21cm line absorption by the Warm Neutral Medium (WNM) using the Westerbork Synthesis Radio Telescope. The absorption was detected toward Cygnus A at LSR velocities of -40 and -70...
Detection of an H92 alpha recombination line in the starburst galaxy NGC 660 (1998)
Phookun, B., Anantharamaiah, K.R., Goss, W.M.
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The simultaneous spectrum of Sgr A* from 20cm to 1mm and the nature of the mm-excess (1998)
Falcke, Heino, Goss, W. M., Matsuo, Hiroshi, Teuben, Peter, Zhao, Jun-Hui, Zylka, Robert
We report results from a multiwavelength campaign to measure the simultaneous spectrum of the super-massive black hole candidate Sgr A* in the Galactic Center from cm to mm-wavelengths using the VLA,...
A thermal plume in NGC 2024 (1997)
Subrahmanyan, Ravi, Goss, W.M., Megeath, S.T., Peter, Barnes J.
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Falcke, Heino, Goss, W. M., Ho, L. C., Matsuo, H., Teuben, P., Wilson, A. S., ...
We report first results from a multiwavelength campaign to measure the simultaneous spectrum of Sgr A* from cm to mm wavelengths. The observations confirm that the previously detected submm-excess is...
Zhao, Jun-Hui, Anantharamaiah, K.R., Goss, W.M., Viallefond, F.
Using the Very Large Array (VLA), 1 we have observed the H92 alpha line in the nuclear regions of NGC 3628 and Arp 299 (IC 694 + NGC 3690) with an angular resolution of 1". The radio recombination...
Claussen, M. J, Frail, D. A., Goss, W. M., Gaume, R. A.
(abridged) - We present arcsecond resolution observations from the VLA of the satellite line of the hydroxyl molecule (OH) at 1720.53 MHz toward three Galactic supernova remnants: W28, W44 and IC443....
New results from H92 alpha recombination line observations of NGC 253 (1997)
Anantharamaiah, K.R., Goss, W.M.
Restricted Access. Proceedings of the 1st Guillermo Haro conference on astrophysics: Starburst activity in galaxies, Mexico, 1996. Ed. J. Franco et al., 1997.
Radio recombination lines from the nuclear regions of starburst galaxies (1996)
Zhao, Jun-Hui, Anantharamaiah, K.R., Goss, W.M., Viallefond, F.
Using the Very Large Array (VLA) with an angular resolution of 3", we have detected the hydrogen recombination line H92α from the galaxies Arp 220, M83, and NGC 2146. The line emission arises from...
Orthogonal rotating gaseous disks near the nucleus of NGC 253 (1996)
Anantharamaiah, K.R., Goss, W.M.
The central ~150 pc region of the starburst galaxy NGC 253 is shown to have a distinct gaseous kinematic subsystem, exhibiting rotation in a plane perpendicular to the galactic disk, and an interior...
Electron temperatures in the galactic HII regions W43 and M17 (1996)
Subrahmanyan, Ravi, Goss, W.M.
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The Pulsar Wind Nebula Around PSR B1853+01 in the Supernova Remnant W44 (1996)
Frail, D. A., Giacani, E. B., Goss, W. M., Dubner, G.
We present radio observations of a region in the vicinity of the young pulsar PSR B1853+01 in the supernova remnant W44. The pulsar is located at the apex of an extended feature with cometary...
Does the Crab Have a Shell? (1995)
Frail, D. A., Kassim, N. E., Cornwell, T. J., Goss, W. M.
We present deep images of a region around the Crab nebula made with the VLA, utilizing new imaging and deconvolution algorithms in a search for a faint radio shell. The existence of a high-velocity,...
330-MHz radio continuum imaging of the W51 complex (1995)
Subrahmanyan, Ravi, Goss, W.M.
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Radio recombination lines from external galaxies (1995)
Anantharamaiah, K.R., Zhao, Jun-Hui, Goss, W.M., Viallefond, F.
Using the Very Large Array1 and the Australia Telescope we have searched for the H92 α recombination line from 14 external galaxies and detected the line in 9 of them. All the detected galaxies have...
The Radio Lifetime of Supernova Remnants and the Distribution of Pulsar Velocities at Birth (1994)
Frail, D. A., Goss, W. M., Whiteoak, J. B. Z.
We have made VLA images of the fields around three young pulsars which have resulted in the discovery of two new supernova remnants and confirmation of a third. We argue that, in at least two cases...
Shock Excited Maser Emission from the Supernova Remnant W28 (1993)
Frail, D. A., Goss, W. M., Slysh, V. I.
We present VLA observations in the hydroxyl line OH(1720 MHz) towards the supernova remnant W28. These high resolution images show a more extensive distribution of 1720 MHz emission than had...
Detection of H92 alpha recombination line from the galaxies NGC 3628, IC 694, and NGC 1365 (1993)
Anantharamaiah, K.R., Zhao, Jun-Hui, Goss, W.M., Viallefond, F.
Using the Very Large Array with an angular resolution of 3", we have detected the hydrogen recombination line H92alpha (Vrest = 8309.38 MHz) from the starburst nuclei in the galaxies NGC 3628 and IC...
VLA observations of 1E 1740.7-2942 - A search for radio recombination lines of positronium (1993)
Anantharamaiah, K.R., Dwarakanath, K.S., Morris, D., Goss, W.M., Radhakrishnan, V.
We have searched for the Ps87-alpha recombination line of positronium at the position of the Einstein X-ray source 1E 1740.7-2942 which has been identified as a strong source of time-variable...
Anantharamaiah, K.R., Pedlar, A., Ekers, R.D., Goss, W.M.
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Source-noise in radio synthesis images (1991)
Anantharamaiah, K.R., Deshpande, A.A., Radhakrishnan, V., Ekers, R.D., Cornwell, T.J., Goss, W.M.
Open Access. Radio interferometry: Theory, techniques, and applications; Proceedings of the 131st IAU Colloquium, Socorro, NM, Oct. 8-12, 1990.
Interferometric Observations of HII, CII, and H Regions in Orion B (1990)
Anantharamaiah, K.R., Goss, W.M., Dewdney, P.E.
Restricted Access. Radio Recombination Lines: 25 Years of Investigation, Proceedings of IAU Colloq. 125, held in Puschino, USSR, September 11-16, 1989. Edited by M. A. Gordon and R. L. Sorochenko....
VLA observations of recombination lines from the star burst galaxy NGC253 (1990)
Anantharamaiah, K.R., Goss, W.M.
Restricted Access. Radio Recombination Lines: 25 Years of Investigation, Proceedings of IAU Colloq. 125, held in Puschino, USSR, September 11-16, 1989. Edited by M. A. Gordon and R. L. Sorochenko....
Radio studies of the Galactic Center. I. The Sagittarius A complex (1989)
Pedlar, A., Anantharamaiah, K.R., Ekers, R.D., Goss, W.M., Van Gorkom, J.H., Schwarz, U.J., ...
VLA observations of the Sgr A complex at 90 cm, 20 cm, and 6 cm are combined to obtain spectral index and optical depth distributions across the source and are used to constrain the three-dimensional...
The nature, location and environment of Sgr A east (1989)
Goss, W.M., Anantharamaiah, K.R., Van Gorkom, J.H., Ekers, R.D., Pedlar, A., Schwarz, U.J., ...
Open Access. The Center of the Galaxy: Proceedings of the 136th Symposium of the International Astronomical Union, held in Los Angeles, U.S.A., July 25-29, 1988. Edited by Mark Morris. International...
Noise in images of very bright sources (1989)
Anantharamaiah, K.R., Ekers, Ronald D., Radhakrishnan, V., Cornwell, T.J., Goss, W.M.
Restricted Access. Synthesis imaging in radio astronomy, A collection of Lectures from the Third NRAO Synthesis Imaging Summer School, Eds. Richard A. Perley, Frederic R. Schwab, and Alan H. Bridle....
The large-scale radio structure of Fornax A (1983)
Ekers, R.D., Goss, W.M., Wellington, K.J., Bosma, A., Smith, R.M., Schweizer, F.
The large-scale radio structure of Fornax A (1983)
Ekers, R.D., Goss, W.M., Wellington, K.J., Bosma, A., Smith, R.M., Schweizer, F.
OH observations of the dust complex LYNDS 1630 and of NGC 2024 (1976)
Goss, W. M., Winnberg, A., Johansson, L. E. B., Fournier, A.
Open Access.
Wide spectrum H2O sources -- Astrophysical Raman masers (1975)
Radhakrishnan, V., Goss, W.M., Bhandari, R.
The extraordinarily wide 22 GHz emission from W49A and two other galactic HI1 regions is discussed, and arguments presented why the entire width of these spectra cannot be attributed to the 616 →...