Only the Lonely: HI Imaging of Void Galaxies (2009)
Stanonik, K., Platen, E., Aragon-Calvo, M. A., Van Gorkom, J. H., Van Der Hulst, J. M., ...
We have completed a pilot survey imaging 15 SDSS selected void galaxies in HI in local (d=50 to 100 Mpc) voids. This small sample makes up a surprisingly interesting collection of galaxies,...
VIVA, VLA Imaging of Virgo spirals in Atomic gas: I. The Atlas & The HI Properties (2009)
Chung, Aeree, Van Gorkom, J. H., Kenney, Jeffrey D. P., Crowl, Hugh, Vollmer, Bernd
We present the result of a new VLA HI Imaging survey of Virgo galaxies, VIVA (the VLA Imaging survey of Virgo galaxies in Atomic gas). The survey includes high resolution HI data of 53 carefully...
Environmental effects in the cluster Abell 85 (2009)
Bravo-Alfaro, H., Van Gorkom, J. H., Caretta, C., Islas, J. M.
Based on a VLA HI-imaging through the total volume of the cluster Abell 85, we compare the distribution of HI-rich and HI deficient late type galaxies with the intra cluster medium (ICM) drawn by the...
ESO 381-47, an early-type galaxy with extended HI and a star forming ring (2009)
Donovan, Jennifer L., Serra, Paolo, Van Gorkom, J. H., Trager, S. C., Oosterloo, Tom, Hibbard, J. E., ...
ESO 381-47 is an early type galaxy with an extended HI disk. GALEX and very deep optical images reveal a distinct stellar ring far outside the optical body with a diameter of ~30 kpc, which has...
Polar disk galaxy found in wall between voids (2009)
Stanonik, K., Platen, E., Aragón-Calvo, M. A., Van Gorkom, J. H., Van Der Hulst, J. M., ...
We have found an isolated polar disk galaxy in what appears to be a cosmological wall situated between two voids. This void galaxy is unique as its polar disk was discovered serendipitously in an HI...
Emonts, B. H. C., Morganti, R., Van Gorkom, J. H., Oosterloo, T. A., Brogt, E., Tadhunter, C. N.
We present the detection of a low surface-brightness stellar counterpart to an enormous (190 kpc) ring of neutral hydrogen (HI) gas that surrounds the nearby radio galaxy B2 0648+27. This system is...
Pre-peak ram pressure stripping in the Virgo cluster spiral galaxy NGC 4501 (2008)
Vollmer, B., Soida, M., Chung, A., Van Gorkom, J. H., Otmianowska-Mazur, K., Beck, R., ...
VIVA HI observations of the Virgo spiral galaxy NGC 4501 are presented. The HI disk is sharply truncated to the southwest, well within the stellar disk. A region of low surface-density gas, which is...
Verheijen, Marc, Van Gorkom, J.H., Szomoru, A., Dwarakanath, K.S., Poggianti, B.M., Schiminovich, D.
Restricted Access. An open-access version is available at arXiv.org (one of the alternative locations)
Environmentally-Driven Evolution of Simulated Cluster Galaxies (2007)
Tonnesen, Stephanie, Bryan, Greg L., Van Gorkom, J. H.
Galaxies in clusters are gas-deficient and a number of possible explanations for this observation have been advanced, including galaxy-cluster tidal interactions, galaxy harassment, and ISM-ICM gas...
Verheijen, Marc A. W., Van Gorkom, J. H., Szomoru, A., Dwarakanath, K. S., Poggianti, B. M., Schiminovich, D.
A pilot study with the powerful new backend of the Westerbork Synthesis Radio Telescope (WSRT) of two galaxy clusters at z=0.2 has revealed neutral hydrogen emission from 42 galaxies. The WSRT probes...
How Dry Are Red Mergers? (2007)
Donovan, Jennifer L., Hibbard, J. E., Van Gorkom, J. H.
The focus of current research in galaxy evolution has increasingly turned to understanding the effect that mergers have on the evolution of systems on the red sequence. For those interactions...
Virgo Galaxies with Long One-Sided HI Tails (2007)
Chung, Aeree, Van Gorkom, J. H., Kenney, Jeffrey D. P., Vollmer, Bernd
In a new HI imaging survey of Virgo galaxies (VIVA: VLA Imaging of Virgo galaxies in Atomic gas), we find 7 spiral galaxies with long HI tails. The morphology varies but all the tails are extended...
The Evolution of the ISM in the Mildly Disturbed Spiral Galaxy NGC 4647 (2006)
Young, L. M., Rosolowsky, E., Van Gorkom, J. H., Lamb, S. A.
We present matched-resolution maps of HI and CO emission in the Virgo Cluster spiral NGC 4647. The galaxy shows a mild kinematic disturbance in which one side of the rotation curve flattens but the...
Origin of the Counter-Rotating Gas in NGC 1596 (2006)
Chung, Aeree, Koribalski, Baerbel, Bureau, Martin, Van Gorkom, J. H.
We present Australia Telescope Compact Array (ATCA) HI imaging of the edge-on galaxy NGC 1596, which was recently found to have counter-rotating ionized gas in its center (
A dynamical model for the heavily ram pressure stripped Virgo spiral galaxy NGC 4522 (2006)
Vollmer, B., Soida, M., Otmianowska-Mazur, K., Kenney, J. D. P., Van Gorkom, J. H., Beck, R.
A dynamical model including ram pressure stripping is applied to the strongly HI deficient Virgo spiral galaxy NGC 4522. A carefully chosen model snapshot is compared with existing VLA HI...
The very late-stage merger IC 4200:pre-elliptical or pre-spiral? (2005)
Serra, P., Trager, S. C., Van Der Hulst, J. M., Oosterloo, T. A., Morganti, R., Van Gorkom, J. H.
Recent observations have revealed a class of unusually HI-rich early-type galaxies. By combining observations of their morphology, stellar populations and neutral hydrogen we aim to understand how...
Observations of Stripped Edge-on Virgo Cluster Galaxies (2005)
Crowl, Hugh H., Kenney, Jeffrey D. P., Van Gorkom, J. H., Vollmer, Bernd
We present observations of highly inclined, HI deficient, Virgo cluster spiral galaxies. Our high-resolution VLA HI observations of edge-on galaxies allow us to distinguish extraplanar gas from disk...
Chung, Aeree, Van Gorkom, J. H., Kenney, Jeffery D. P., Vollmer, Bernd
We present preliminary results of VLA HI imaging of selected Virgo cluster galaxies. The goal is to study environmental effects on galaxy evolution. Our sample of 41 galaxies is spread throughout the...
Dense Cloud Ablation and Ram Pressure Stripping of the Virgo Spiral NGC 4402 (2005)
Crowl, Hugh H., Kenney, Jeffrey D. P., Van Gorkom, J. H., Vollmer, Bernd
We present optical, HI and radio continuum observations of the highly inclined Virgo Cluster Sc galaxy NGC 4402, which show evidence for ram-pressure stripping and dense cloud ablation. VLA HI and...
Van Der Hulst, J. M., Sadler, E. M., Jackson, C. A., Hunt, L. K., Verheijen, M., Van Gorkom, J. H.
The unsurpassed sensitivity and resolution of the Square Kilometer Array (SKA) will make it possible for the first time to probe the continuum emission of normal star forming galaxies out to the...
Ram Pressure Stripping in the Low Luminosity Virgo Cluster Elliptical Galaxy NGC 4476 (2004)
Lucero, D. M., Young, L. M., Van Gorkom, J. H.
We present a deep VLA search for HI emission from the low-luminosity Virgo Cluster elliptical galaxy NGC 4476, which contains 1.1 x 10^8 M_sun of molecular gas in an undisturbed disk in regular...
VLA HI Observations of Gas Stripping in the Virgo Cluster Spiral NGC 4522 (2004)
Kenney, Jeffrey D. P., Van Gorkom, J. H., Vollmer, Bernd
We present VLA HI observations at ~20"=1.5 kpc resolution of the highly inclined, HI-deficient Virgo cluster spiral galaxy NGC 4522, which is one of the clearest and nearest cases of ongoing ICM-ISM...
Vollmer, B., Beck, R., Kenney, J. D. P., Van Gorkom, J. H.
Radio continuum observations at 20 and 6 cm of the highly inclined Virgo spiral galaxy NGC 4522 are presented. Both, 20 and 6 cm total emission distributions are asymmetric with an extended component...
First detection of cold dust in the northern shell of NGC 5128 (Centaurus A) (2004)
Stickel, M., Van Der Hulst, J. M., Van Gorkom, J. H., Schiminovich, D., Carilli, C. L.
Deep far-infrared (FIR) imaging data obtained with ISOPHOT at 90 mu;m, 150 mu;m, and 200 mu;m detected the thermal emission from cold dust in the northern shell region of NGC 5128...
Interaction of Galaxies with the ICM (2003)
In recent years a wealth of data and detailed hydrodynamical simulations have appeared that show the effects of interactions between the ICM and galaxies. Single dish observations show that cluster...
An HI survey of clusters in the local universe (2003)
Van Gorkom, J.H., Bravo-Alfaro, H, Dwarakanath, K.S., Guhathakurta, P., Poggianti, B.M., Schiminovich, D., ...
Restricted Access.
LSB Galaxies and the Tully-Fisher Relation (2002)
Chung, Aeree, Van Gorkom, J. H., O'Neil, K., Bothun, G. D.
We present VLA HI imaging of four LSB galaxies which were thought to strongly deviate from the TF relation based on Arecibo single-dish observations. We do not detect three of the four targeted LSB...
Hibbard, J. E., Van Gorkom, J. H., Rupen, M. P., Schiminovich, D.
We have begun a compilation of HI maps of peculiar galaxies kindly contributed by individual investigators, many as part of the ``Gas & Galaxy Evolution'' conference. In this gallery we present...
Bravo-Alfaro, H., Cayatte, V., Van Gorkom, J. H., Balkowski, C.
In the first paper of this series we used HI observations of the 19 brightest spirals in Coma to analyze the dynamical state of the cluster. In this paper we present the detailed HI distribution and...
Atomic and molecular gas in the merger galaxy NGC 1316 (Fornax A) and its environment (2001)
Horellou, C., Black, J. H., Van Gorkom, J. H., Combes, F., Van Der Hulst, J. M., Charmandaris, V.
We present and interpret observations of atomic and molecular gas toward the southern elliptical galaxy NGC 1316 (Fornax A), a strong double-lobe radio source with a disturbed optical morphology that...
HI in the shell elliptical NGC 3656 (2001)
Balcells, M., Van Gorkom, J. H., Sancisi, R., Del Burgo, C.
VLA neutral hydrogen observations of the shell elliptical NGC 3656 reveal an edge-on, warped minor axis gaseous disk (M_HI ~ 2.10^9 Msun) extending 7 kpc. HI is also found outside the optical image,...
The Disk and Dark Halo Mass of the Barred Galaxy NGC 4123. I. Observations (2000)
Weiner, Benjamin J., Williams, T. B., Van Gorkom, J. H., Sellwood, J. A.
The non-circular streaming motions in barred galaxies are sensitive to the mass of the bar and can be used to lift the degeneracy between disk and dark matter halo encountered when fitting...
VLA HI imaging of the brightest spiral galaxies in Coma (1999)
Bravo-Alfaro, H., Cayatte, V., Van Gorkom, J. H., Balkowski, C.
We have obtained 21cm images of 19 spiral galaxies in the Coma cluster, using the VLA in its C and D configurations. The sample selection was based on morphology, brightness, and optical diameters of...
A Cluster of Low-Redshift Lyman-alpha Clouds toward PKS 2155-304. I. Limits on Metals and D/H (1998)
Shull, J. Michael, Penton, Steven V., Stocke, John T., Giroux, Mark L., Van Gorkom, J. H., Lee, Yong-Han, ...
We report observations from the Hubble Space Telescope (HST) and the VLA on the galactic environment, metallicity, and D/H in strong low-redshift Lya absorption systems toward the bright BL Lac...
The HI Environment of Nearby Lyman-alpha Absorbers (1996)
Van Gorkom, J. H., Carilli, C. L., Stocke, John T., Perlman, Eric S., Shull, J. Michael
We present the results of a VLA and WSRT search for HI emission from the vicinity of seven nearby clouds, which were observed in Lya absorption with HST toward Mrk335, Mrk501 and PKS2155-304. We...
H I, H II, and R-Band Observations of a Galactic Merger Sequence (1995)
Hibbard, J. E., Van Gorkom, J. H.
We present high-quality aperture synthesis observations of the neutral hydrogen distribution in a sample of five galactic systems believed to be involved in progressive stages of merging: Arp295,...
An HI survey of the Bootes Void. I. The Data (1995)
Szomoru, A., Van Gorkom, J. H., Gregg, M. D.
We present the results of a neutral hydrogen survey of the Bootes void carried out with the VLA in D-array. The survey covers $\sim 1100$ Mpc$^{3}$, about 1\% of the volume of the void as defined by...
An HI survey of the Bootes Void. II. The Analysis (1995)
Szomoru, A., Van Gorkom, J. H., Gregg, M. D., Strauss, M. A.
We discuss the results of a VLA HI survey of the Bootes void and compare the distribution and HI properties of the void galaxies to those of galaxies found in a survey of regions of mean cosmic...
Detection of an H I disk in Hydra A? (1995)
Dwarakanath, K.S., Owen, F.N., Van Gorkom, J.H.
We present new observations of the H I absorption system seen toward the core of the radio galaxy Hydra A, which is the central galaxy in a cooling flow cluster Abell 780. Our improved spatial...
A VLA search for neutral hydrogen in cooling flow clusters (1994)
Dwarakanath, K.S., Van Gorkom, J.H., Owen, F.N.
We present a Very Large Array (VLA) search for neutral hydrogen in three clusters, which are considered to be prime examples of so-called cooling flow clusters: Virgo (Virgo A), Abell 2199 (3C 338),...
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...