Outflows and Massive Stars in the protocluster IRAS 05358+3543 (2009)
Ginsburg, Adam G., Bally, John, Yan, Chi-Hung, Williams, Jonathan P.
We present new near-IR H2, CO J=2-1, and CO J = 3-2 observations to study outflows in the massive star forming region IRAS 05358+3543. The Canada-France-Hawaii Telescope H2 images and James Clerk...
The Bolocam Galactic Plane Survey -- II. Catalog of the Image Data (2009)
Rosolowsky, Erik, Dunham, Miranda K., Ginsburg, Adam, Bradley, Eric Todd, Aguirre, James, Bally, John, ...
We present a catalog of 8358 sources extracted from images produced by the Bolocam Galactic Plane Survey (BGPS). The BGPS is a survey of the millimeter dust continuum emission from the northern...
The Circinus Star Forming Complex (2009)
Bo Reipurth, Bo Reipurth, John Bally, Josh Walawender
Abstract. The Circinus giant molecular cloud is a little explored region that deserves closer study owing to the many signs of vigorous low-mass star formation in the form of Hα emission stars,...
Bo Reipurth, John Bally, Josh Walawender, Doug Johnstone, Helen Kirk, Alyssa Goodman
Abstract. The Perseus molecular cloud and its surroundings contain several regions of active or recent star formation lying within about 300 pc of the Sun (see Figure 1). Roughly a dozen OB and over...
The L1617 and L1622 Cometary Clouds in Orion (2009)
Bo Reipurth, Bo Reipurth, S. T. Megeath, John Bally, J. Walawender
Abstract. The molecular cloud complex encompassing the cometary clouds L1617 and L1622 is located just outside of Barnard’s Loop in Orion. It lies to the northeast of the Orion Nebula Cluster at a...
Young stellar clusters and star formation throughout the Galaxy (2009)
Feigelson, Eric, Adams, Fred, Allen, Lori, Bergin, Edwin, Bally, John, Balog, Zoltan, ...
Most stars are born in rich young stellar clusters (YSCs) embedded in giant molecular clouds. The most massive stars live out their short lives there, profoundly influencing their natal environments...
A Pulsed, Precessing Jet in Cepheus A (2009)
Cunningham, Nathaniel J., Moeckel, Nickolas, Bally, John
We present near-infrared H2, radio CO, and thermal infrared observations of the nearby massive star-forming region Cepheus A (Cep A). From H2 bow shocks arranged along four distinct jet axes, we...
8.11 A REAL TIME FORECAST VERIFICATION SYSTEM (2008)
Elizabeth Ebert, John Bally, Barbara Brown, Laurence Wilson, Barbara Casati
To make best use of nowcasts and very short range forecasts in an operational setting it is desirable to have rapid feedback on how the forecast system is performing. Currently this is done...
Overview of the Orion Complex (2008)
The Orion star formation complex is the nearest region of on-going star formation that continues to produce both low and high mass stars. Orion is discussed in the larger context of star formation in...
P13B.16 THE AUSTRALIAN NOWCASTING SYSTEM (2008)
John Bally, Tony Bannister, Kevin Cheong, Y Dance, Tom Keenan, Phil Purdam
During the last decade there has been an increasing need and desire to use radar data quantitatively as well as qualitatively in Australia
Young stars orbiting in the gravitational potential well of forming star clusters pass through the cluster's dense molecular gas and can experience Bondi-Hoyle accretion from reservoirs outside their...
Externally Illuminated Young Stellar Objects in the Orion Nebula (2008)
. The circumstellar material surrounding most low-mass young stars in the Orion Nebula Cluster is rendered visible by the ionizing radiation of the hot Trapezium stars and the background light of...
Outflows from Massive Stars (2007)
The properties of outflows powered by massive stars are reviewed with an emphasis on the nearest examples, Orion and Cepheus-A. The Orion OMC1 outflow may have been powered by the dynamical decay of...
Mark J. Mccaughrean, Hua Chen, John Bally, Rodger Thompson, Marcia Rieke, Glenn Schneider, ...
We present the first high-resolution near-infrared images of the edge-on silhouette circumstellar disk, Orion 114�426, made using NICMOS on the Hubble Space Telescope. Images taken against the...
JCMT/SCUBA Sub-Millimeter Wavelength Imaging of the Integral Shaped Filament in Orion (2007)
Doug Johnstone Canadian, Doug Johnstone, John Bally
We present the first high dynamic range and sensitivity images of the sub-millimeter wavelength continuum emission at 450m and 850m of the "Integral Shaped Filament" in the northern portion...
Doug Johnstone, David Hollenbach, John Bally
We present a model for the photoevaporation of circumstellar disks or dense clumps of gas by an external source of ultraviolet radiation. Our model includes the thermal and dynamic e+ects of 613.6 eV...
.12 Micron Molecular Hydrogen Emission From Circumstellar Disks Embedded In The Orion Nebula (2007)
Hua Chen Steward, Hua Chen, John Bally, C. Robert O’dell, Mark J. Mccaughrean, Rodger L. Thompson, ...
We present narrowband images of two externally illuminated circumstellar disks embedded in the Orion Nebula. The images were taken with camera 2 of the Near-Infrared Camera and Multiobject...
Multiple CO Outflows in Circinus: The Churning of a Molecular Cloud (2007)
John Bally, Bo Reipurth, Charles J. Lada
We present a millimeter wave study of a cluster of bipolar CO outflows embedded in the western end of the Circinus molecular cloud complex, G317-4, that is traced by very high optical extinction. For...
John Bally, Ralph S. Sutherl, David Devine, Doug Johnstone
We present new 0.05 00 (22 AU) resolution narrow-band Hubble Space Telescope Planetary Camera images of externally illuminated young stellar objects embedded in the Orion Nebula. We also present 0.02...
John Bally, David Theil, Ralph S. Sutherland
. We review the characteristics of the Orion/Eridanus bubble, its relationship to the Orion OB association, and the molecular clouds in the region. We discuss the relationship of the Orion region to...
Evidence for Dust Grain Growth in Young Circumstellar Disks (2007)
Henry B. Throop, John Bally, Larry W. Esposito, Mark J. Mccaughrean
Hundreds of circumstellar disks in the Orion nebula are being rapidly destroyed by the intense ultraviolet radiation produced by nearby bright stars. These young million-year-old disks may not...
COMETARY GLOBULES IN THE ORION SUPER-BUBBLE (2007)
David S. Theil, Ka Chun, John Bally
Interstellar clouds with a cometary appearance (a compact "head " with a wider diffuse "tail") are likely artifacts of interactions of winds, shocks and ionization...
Hubble Space Telescope NICMOS images and VLA maps (2007)
Bo Reipurth, Ka Chun Yu, Steve Heathcote, John Bally
Abstract. We have observed the region around the HH 111 jet source with NICMOS onboard the Hubble Space Telescope, using two filters, F160W and F205W, which besides stellar continuum transmit the...
SHOCK-EXCITED H 2 FLOWS IN OMC-2 AND OMC-3 (2007)
We report the discovery of nearly a dozen collimated outflows from young stellar objects embedded in the molecular filament that extends north of the Orion Nebula towards the H II region NGC 1977....
Bo Reipurth, Steve Heathcote, Ka Chun Yu, John Bally
We present new Hubble Space Telescope (HST) NICMOS images of the source region of the HH 1/2 ow. The HH 1 jet is traced in the [Fe II] 1.64 km and the 2.12 km lines to about of the deeply H 2
[Fe II] JETS, BINARITY, AND ENVELOPE CAVITIES (2007)
Bo Reipurth, Ka Chun Yu, Steve Heathcote, John Bally
We have observed seven regions surrounding the driving sources of Herbig-Haro ows using the NICMOS infrared camera on board the Hubble Space Telescope. These Herbig-Haro energy sources,
OUTFLOWS, JETS AND SHOCKS IN THE ORION NEBULA (2007)
El cumulo de estrellas jovenes asociadas a la Nebulosa de Orion es un buen laboratorio para el estudio de los plasmas. Vemos cinco tipos de ujos y choques. Los ujos de foto-ablacion de los proplyds...
RevMexAA (Serie de Conferencias), 9, 194--197 (2000) (2007)
Outflows Jets And, C. R. O’dell, John Bally
The rich young cluster of stars associated with the Orion Nebula provides a unique laboratory for the study of plasma phenomena. We see five types of flows and shocks. Photoablation outflow from the...
Visual Binaries in the Orion Nebula Cluster (2007)
Reipurth, Bo, Guimarães, Marcelo M., Connelley, Michael S., Bally, John
We have carried out a major survey for visual binaries towards the Orion Nebula Cluster using HST images obtained with an H-alpha filter. Among 781 likely ONC members more than 60" from theta-1 Ori...
Smith, Nathan, Bally, John, Walawender, Josh
We report the discovery of two new circumstellar ring nebulae in the western Carina Nebula. The brighter object, SBW1, resembles a lidless staring eye and encircles a B1.5 Iab supergiant. Its size is...
Binary Capture Rates for Massive Protostars (2007)
Moeckel, Nickolas, Bally, John
The high multiplicity of massive stars in dense, young clusters is established early in their evolution. The mechanism behind this remains unresolved. Recent results suggest that massive protostars...
Capture Formed Binaries via Encounters with Massive Protostars (2006)
Moeckel, Nickolas, Bally, John
Most massive stars are found in the center of dense clusters, and have a companion fraction much higher than their lower mass siblings; the massive stars of the Trapezium core in Orion have ~ 1.5...
We present results from a 2300 arcmin^2 survey of the Orion A molecular cloud at 450 and 850 micron using the Submillimetre Common-User Bolometer Array (SCUBA) on the James Clerk Maxwell Telescope....
Stellar Encounters with Massive Star-Disk Systems (2006)
Moeckel, Nickolas, Bally, John
The dense, clustered environment in which massive stars form can lead to interactions with neighboring stars. It has been hypothesized that collisions and mergers may contribute to the growth of the...
Outflows, jets and shocks in the orion nebula (2006)
Outflows, jets and shocks in the orion nebula
Entrainment Mechanisms for Outflows in the L1551 Star-Forming Region (2006)
Stojimirović, Irena, Narayanan, Gopal, Snell, Ronald L., Bally, John
We present high sensitivity 12/13CO(1-0) molecular line maps covering the full extent of the parsec scale L1551 molecular outflow, including the redshifted east-west (EW) flow. We also present...
Cleaning up Eta Carinae: Detection of Ammonia in the Homunculus (2006)
Smith, Nathan, Brooks, Kate J., Koribalski, Baerbel S., Bally, John
We report the first detection of ammonia in the Homunculus nebula around eta Carinae, which is also the first detection of emission from a polyatomic molecule in this or any other luminous blue...
Shuping, R. Y., Kassis, Marc, Morris, Mark, Smith, Nathan, Bally, John
We present 8--13 micron low resolution spectra (R~100) of 8 low-mass protostellar objects ("proplyds") in the Orion Nebula using the Long Wavelength Spectrometer (LWS) at the W. M. Keck Observatory....
Resolving the nature of the Rosette HH1 jet facing strong UV dissipation (2006)
Li, Jin Zeng, Chu, You-Hua, Gruendl, Robert A., Bally, John, Su, Wei
The Rosette HH1 jet is a collimated flow immersed in the strong UV radiation field of the Rosette Nebula. We investigate the physical properties of the Rosette HH1 jet using high-quality narrow-band...
X-rays from HH210 in the Orion nebula (2006)
Grosso, Nicolas, Feigelson, Eric, Getman, Konstantin, Kastner, Joel, Bally, John, McCaughrean, Mark
Also archived in: arXiv: astro-ph/0601508 v1 23 Jan 2006
X-rays from HH210 in the Orion nebula (2006)
Grosso, Nicolas, Feigelson, Eric, Getman, Konstantin, Kastner, Joel, Bally, John, McCaughrean, Mark
Also archived in: arXiv: astro-ph/0601508 v1 23 Jan 2006
X-rays from HH210 in the Orion nebula (2006)
Grosso, Nicolas, Feigelson, Eric, Getman, Konstantin, Kastner, Joel, Bally, John, Mccaughrean, Mark
We report the detection during the Chandra Orion Ultradeep Project (COUP) of two soft, constant, and faint X-ray sources associated with the Herbig-Haro object HH210. HH210 is located at the tip of...
X-rays from HH210 in the Orion nebula (2006)
Grosso, Nicolas, Feigelson, Eric, Getman, Konstantin, Kastner, Joel, Bally, John, Mccaughrean, Mark
We report the detection during the Chandra Orion Ultradeep Project (COUP) of two soft, constant, and faint X-ray sources associated with the Herbig-Haro object HH210. HH210 is located at the tip of...
X-rays from HH210 in the Orion nebula (2006)
Grosso, Nicolas, Feigelson, Eric D., Getman, Konstantin V., Kastner, Joel H., Bally, John, McCaughrean, Mark J.
We report the detection during the Chandra Orion Ultradeep Project (COUP) of two soft, constant, and faint X-ray sources associated with the Herbig-Haro object HH210. HH210 is located at the tip of...
X-rays from HH210 in the Orion nebula (2006)
Grosso, Nicolas, Feigelson, Eric, Getman, Konstantin, Kastner, Joel, Bally, John, Mccaughrean, Mark
We report the detection during the Chandra Orion Ultradeep Project (COUP) of two soft, constant, and faint X-ray sources associated with the Herbig-Haro object HH210. HH210 is located at the tip of...
X-rays from HH210 in the Orion nebula (2006)
Grosso, Nicolas, Feigelson, Eric, Getman, Konstantin, Kastner, Joel, Bally, John, Mccaughrean, Mark
We report the detection during the Chandra Orion Ultradeep Project (COUP) of two soft, constant, and faint X-ray sources associated with the Herbig-Haro object HH210. HH210 is located at the tip of...
Multi-Generational Star Formation in L1551 (2005)
Moriarty-Schieven, Gerald H., Johnstone, Doug, Bally, John, Jenness, Tim
The L1551 molecular cloud contains two small clusters of Class 0 and I protostars, as well as a halo of more evolved Class II and III YSOs, indicating a current and at least one past burst of star...
X-ray emission from Orion Nebula Cluster stars with circumstellar disks and jets (2005)
Kastner, Joel, Franz, Geoffrey, Grosso, Nicolas, Bally, John, McCaughrean, Mark, Getman, Konstantin, ...
Also archived in: arXiv: astro-ph/0506650 v1 27 Jun 2005
Chandra Orion Ultradeep Project: observations and source lists (2005)
Getman, Konstantin, Flaccomio, Ettore, Broos, Patrick, Grosso, Nicolas, Tsujimoto, Masahiro, Townsley, Leisa, ...
Also archived in: arXiv: astro-ph/0410136 v1 6 Oct 2004
X-ray emission from Orion Nebula Cluster stars with circumstellar disks and jets (2005)
Kastner, Joel, Franz, Geoffrey, Grosso, Nicolas, Bally, John, McCaughrean, Mark, Getman, Konstantin, ...
Also archived in: arXiv: astro-ph/0506650 v1 27 Jun 2005
Chandra Orion Ultradeep Project: Observations and source lists (2005)
Getman, Konstantin, Flaccomio, Ettore, Broos, Patrick, Grosso, Nicolas, Tsujimoto, Masahiro, Townsley, Leisa, ...
Also archived in: arXiv: astro-ph/0410136 v1 6 Oct 2004
COUP census of X-ray stars in BN-KL and OMC-1S (2005)
Grosso, Nicolas, Feigelson, Eric, Getman, Konstantin, Townsley, Leisa, Broos, Patrick, Flaccomio, Ettore, ...
We present a study of the X-ray sources detected in the vicinity of two density peaks in the Orion Molecular Cloud 1 behind the Orion Nebula Cluster (ONC), as seen in the exceptionally deep (~10...
The [O III] Veil: Astropause of Eta Carinae's Wind? (2005)
Smith, Nathan, Morse, Jon A., Bally, John
We present narrowband images of eta Carinae in the light of [O III] 5007 obtained with HST/WFPC2, as well as a ground-based image in the same emission line with a larger field of view. These images...
X-ray Emission from Orion Nebula Cluster Stars with Circumstellar Disks and Jets (2005)
Kastner, Joel H., Franz, Geoffrey, Grosso, Nicolas, Bally, John, McCaughrean, Mark J., Getman, Konstantin, ...
We investigate the X-ray and near-infrared emission properties of a sample of pre-main sequence (PMS) stellar systems in the Orion Nebula Cluster (ONC) that display evidence for circumstellar disks...
Thermal Dust Emission from Proplyds, Unresolved Disks, and Shocks in the Orion Nebula (2005)
Smith, Nathan, Bally, John, Shuping, Ralph Y., Morris, Mark, Kassis, Marc
We present a new 11.7 micron mosaic image of the Orion nebula obtained with T-ReCS on Gemini South. The map includes the BN/KL region, the Trapezium, and OMC-1 South. Excluding BN/KL, we detect 91...
COUP census of X-ray stars in BN-KL and OMC-1S (2005)
Grosso, Nicolas, Feigelson, Eric, Getman, Konstantin, Townsley, Leisa, Broos, Patrick, Flaccomio, Ettore, ...
We present a study of the X-ray sources detected in the vicinity of two density peaks in the Orion Molecular Cloud 1 behind the Orion Nebula Cluster (ONC), as seen in the exceptionally deep (~10...
The Birth of High Mass Stars: Accretion and/or Mergers? (2005)
The observational consequences of the merger scenario for massive star formation are explored and contrasted with the gradual accumulation of mass by accretion. Protostellar mergers may produce high...
Discovery of a candidate protoplanetary disk around the embedded source IRc9 in Orion (2005)
We report the detection of spatially-extended mid-infrared emission around the luminous embedded star IRc9 in OMC-1, as seen in 8.8, 11.7, and 18.3 micron images obtained with T-ReCS on Gemini South....
COUP census of X-ray stars in BN-KL and OMC-1S (2005)
Grosso, Nicolas, Feigelson, Eric, Getman, Konstantin, Townsley, Leisa, Broos, Patrick, Flaccomio, Ettore, ...
We present a study of the X-ray sources detected in the vicinity of two density peaks in the Orion Molecular Cloud 1 behind the Orion Nebula Cluster (ONC), as seen in the exceptionally deep (~10...
COUP census of X-ray stars in BN-KL and OMC-1S (2005)
Grosso, Nicolas, Feigelson, Eric, Getman, Konstantin, Townsley, Leisa, Broos, Patrick, Flaccomio, Ettore, ...
We present a study of the X-ray sources detected in the vicinity of two density peaks in the Orion Molecular Cloud 1 behind the Orion Nebula Cluster (ONC), as seen in the exceptionally deep (~10...
An S-shaped outflow from IRAS 03256+3055 in NGC 1333 (2004)
Hodapp, Klaus W., Bally, John, Eisloeffel, Jochen, Davis, Christopher J.
The IRAS source 03256+3055 in the NGC 1333 star forming region is associated with extended sub-millimeter emission of complex morphology, showing multiple clumps. One of these is found to coincide...
Can photo-evaporation trigger planetesimal formation? (2004)
We propose that UV radiation can stimulate the formation of planetesimals in externally-illuminated protoplanetary disks. We present a numerical model of disk evolution including vertical...
Opening the Treasure Chest: A Newborn Star Cluster Emerges from its Dust Pillar in Carina (2004)
Smith, Nathan, Stassun, Keivan G., Bally, John
We present detailed observations of the Treasure Chest, a compact nebula at the head of a dust pillar in the southern Carina nebula. This object is of interest because it is an example of a dense...
New Silhouette Disks with Reflection Nebulae and Outflows in the Orion Nebula and M43 (2004)
Smith, Nathan, Bally, John, Licht, Daniel, Walawender, Josh
We report the detection of several new circumstellar disks seen in silhouette in the outskirts of the Orion nebula and M43, detected as part of our Halpha survey of Orion with the HST/ACS. Several of...
Thermal-IR Detection of Optical Outflow Sources in OMC1 South (2004)
Smith, Nathan, Bally, John, Shuping, Ralph Y., Morris, Mark, Hayward, Thomas L.
We present the first thermal-infrared imaging photometry for several embedded sources in the OMC1 South cloud core in the Orion nebula, and propose that some of these drive optical Herbig-Haro jets...
A new mid-infrared map of the BN/KL region using the Keck telescope (2004)
Shuping, R. Y., Morris, Mark, Bally, John
We present a new mid-infrared (12.5micron) map of the BN/KL high-mass star-forming complex in Orion using the LWS instrument at Keck I. Despite poor weather we achieved nearly diffraction-limited...
Anderson-Berry, Linda, Keenan, Tom, Bally, John, Pielke Jr., Roger, Leigh, Roy, King, David
The Sydney 2000 (S2000) Forecast Demonstration Project (FDP) was initiated by the World Meteorological Organization (WMO) World Weather Research Programme (WWRP) to enable the world meteorological...
A Disk Shadow Around the Young Star ASR 41 in NGC 1333 (2003)
Hodapp, Klaus W., Walker, Christina H., Reipurth, Bo, Wood, Kenneth, Bally, John, Whitney, Barbara A., ...
We present images of the young stellar object ASR 41 in the NGC 1333 star forming region at the wavelengths of H_alpha and [SII] and in the I, J, H, and K-bands. ASR 41 has the near-infrared...
Parsec-Scale Herbig-Haro Outflows from Intermediate Mass Stars (2003)
McGroarty, Fiona, Ray, Tom, Bally, John
While there are many parsec-scale Herbig-Haro (HH) outflows known to be driven by low-mass young stars, few are associated with their intermediate mass counterparts. Here we present the discovery of...
Chandra Study of Young Stellar Objects in the NGC 1333 Star-forming Cloud (2002)
Getman, Konstantin V., Feigelson, Eric D., Townsley, Leisa, Bally, John, Lada, Charles J., Reipurth, Bo
NGC 1333, a highly active star formation region within the Perseus molecular cloud complex, has been observed with the ACIS-I detector on board the Chandra X-ray Observatory. In our image with a...
Evidence for dust grain growth in young circumstellar disks (2001)
Throop, Henry B., Bally, John, Esposito, Larry W., McCaughrean, Mark J.
Hundreds of circumstellar disks in the Orion nebula are being rapidly destroyed by the intense ultraviolet radiation produced by nearby bright stars. These young, million-year-old disks may not...
Discovery of X rays from Class 0 protostar candidates in OMC-3 (2001)
Tsuboi, Yohko, Koyama, Katsuji, Hamaguchi, Kenji, Tatematsu, Ken'ichi, Sekimoto, Yutaro, Bally, John, ...
We have observed the Orion Molecular Clouds 2 and 3 (OMC-2 and OMC-3) with the Chandra X-ray Observatory (CXO). The northern part of OMC-3 is found to be particularly rich in new X-ray features; four...
Irradiated Herbig-Haro Jets in the Orion Nebula and Near NGC 1333 (2000)
We report the discovery of a dozen Herbig-Haro jets illuminated by the Lyman continuum and/or softer far-ultraviolet radiation fields of nearby high mass stars. Five irradiated outflows lie in the...
The Antarctic Submillimeter Telescope and Remote Observatory (AST/RO) (2000)
Stark, Antony A., Bally, John, Balm, Simon P., Bania, T. M., Bolatto, Alberto D., Chamberlin, Richard A., ...
AST/RO, a 1.7 m diameter telescope for astronomy and aeronomy studies at wavelengths between 200 and 2000 microns, was installed at the South Pole during the 1994-1995 Austral summer. The telescope...
Outflows, jets and shocks in the orion nebula (2000)
The rich young cluster of stars associated with the Orion Nebula provides a unique laboratory for the study of plasma phenomena. We see ve types of ows and shocks. Photoablation out ow from the...
Super-Sonic Turbulence in the Perseus Molecular Cloud (1999)
Padoan, Paolo, Bally, John, Billawala, Youssef, Juvela, Mika, Nordlund, AAke
We compare the statistical properties of J=1-0 13CO spectra observed in the Perseus Molecular Cloud with synthetic J=1-0 13CO spectra, computed solving the non-LTE radiative transfer problem for a...
Multiple CO Outflows in Circinus: The Churning of a Molecular Cloud (1998)
Bally, John, Reipurth, Bo, Lada, Charles J., Billawala, Youssef
We present a millimeter wave study of a cluster of bipolar CO outflows embedded in the western end of the Circinus molecular cloud complex, G317-4, that is traced by very high optical extinction. For...
Synthetic Molecular Clouds from Supersonic MHD and Non-LTE Radiative Transfer Calculations (1997)
Padoan, Paolo, Juvela, Mika, Bally, John, Nordlund, AAke
The dynamics of molecular clouds is characterized by supersonic random motions in the presence of a magnetic field. We study this situation using numerical solutions of the three-dimensional...
Supersonic Random Flows in the Perseus Molecular Cloud (1997)
Padoan, Paolo, Bally, John, Billawala, Youssef, Juvela, Mika, Nordlund, AAke
We compare the statistical properties of J=1-0 13CO spectra observed in the Perseus Molecular Cloud with synthetic J=1-0 13CO spectra from a 5 pc model cloud. The synthetic spectra are computed...
High-resolution near-infrared imaging of the Orion 114-426 silhouette disk (1997)
McCaughrean, Mark J., Chen, Hua, Bally, John, Erickson, Ed, Thompson, Rodger, Rieke, Marcia, ...
We present the first high-resolution near-infrared images of the edge-on silhouette circumstellar disk, Orion 114-426, made using NICMOS on the Hubble Space Telescope. Images taken against the bright...
A Theoretical Calibration of ^{13}CO LTE Column Density in Molecular Clouds (1997)
Padoan, Paolo, Juvela, Mika, Bally, John, Nordlund, AAke
In this work we use models of molecular clouds (MC), and non-LTE radiative transfer calculations, to obtain a theoretical calibration of the relation between LTE 13CO column density and true column...
Shock Excited H_2 Flows in OMC-2 and OMC-3 (1997)
Yu, Ka Chun, Bally, John, Devine, David
We report the discovery of nearly a dozen collimated outflows from young stellar objects embedded in the molecular filament that extends north of the Orion Nebula towards the H II region NGC 1977....
The feasibility of using airships to transport Australian cargo (1982)
Submitted in partial fulfilment of the requirements for the degree of Master of Environmental Science. Microreproduction of original issued: [Clayton, Vic.], 1982. 103 leaves. Summary (unpaged) at...
The feasibility of using airships to transport Australian cargo (1982)
Submitted in partial fulfilment of the requirements for the degree of Master of Environmental Science. Summary: [unpaged] at front of text. Another copy on MICROFICHE H24/589. Typescript....
The interaction of HII regions with molecular clouds--[microform] /--by John Bally. (1981)
Thesis (Ph. D.)--University of Massachusetts, 1981.
The interaction of HII regions with molecular clouds /--by John Bally. (1981)
Thesis (Ph. D.)--University of Massachusetts, 1981.
The interaction of hydrogen II regions with molecular clouds. (1981)
Thesis (Ph. D.)--University of Massachusetts.
John Bally, Leonardo Testi, Anneila Sargent, John Carlstrom
We present 1.3 millimeter wavelength interferometric observations of two fields containing 6 externally illuminated young stellar objects embedded within the Orion Nebula that have been observed with...