Galaxy Zoo: Bars in Disk Galaxies (2010)
Masters, Karen L., Nichol, Robert C., Hoyle, Ben, Lintott, Chris, Bamford, Steven, Edmondson, Edward M., ...
We present first results from Galaxy Zoo 2, the second phase of the highly successful Galaxy Zoo project (www.galaxyzoo.org). Using a volume-limited sample of 13665 disk galaxies (0.01< z < 0.06 and...
Black hole growth and host galaxy morphology (2010)
Schawinski, Kevin, Urry, C. Megan, Virani, Shanil, Coppi, Paolo, Bamford, Steven P., Treister, Ezequiel, ...
We use data from large surveys of the local Universe (SDSS+Galaxy Zoo) to show that the galaxy-black hole connection is linked to host morphology at a fundamental level. The fraction of early-type...
Schawinski, Kevin, Urry, C. Megan, Virani, Shanil, Coppi, Paolo, Bamford, Steven P., Treister, Ezequiel, ...
We use data from the Sloan Digital Sky Survey and visual classifications of morphology from the Galaxy Zoo project to study black hole growth in the nearby Universe (z < 0.05) and to break down the...
Galaxy Zoo: Dust in Spirals (2010)
Masters, Karen L., Nichol, Robert C., Bamford, Steven, Mosleh, Moein, Lintott, Chris J., Andreescu, Dan, ...
We investigate the effect of dust on spiral galaxies by measuring the inclination-dependence of optical colours for 24,276 well-resolved SDSS galaxies visually classified in Galaxy Zoo. We find clear...
Unveiling Galaxy Interactions: Watching the Tides Roll (2009)
I set the stage for discussion of the stellar populations in interacting galaxies by looking back over the slow development of our understanding of these systems. From early anecdotal collections, to...
Galaxy Zoo Green Peas: Discovery of A Class of Compact Extremely Star-Forming Galaxies (2009)
Cardamone, Carolin N., Schawinski, Kevin, Sarzi, Marc, Bamford, Steven P., Bennert, Nicola, Urry, C. M., ...
We investigate a class of rapidly growing emission line galaxies, known as "Green Peas", first noted by volunteers in the Galaxy Zoo project because of their peculiar bright green colour and small...
Revealing Hanny's Voorwerp: radio observations of IC 2497 (2009)
Jozsa, Gyula I. G., Garrett, M. A., Oosterloo, Tom, Rampadarath, H., Paragi, Zsolt, Van Arkel, H., ...
We present multi-wavelength radio observations in the direction of the spiral galaxy IC 2497 and the neighbouring emission nebula known as "Hanny's Voorwerp". Our WSRT continuum observations at 1.4...
Revealing Hanny's Voorwerp: radio observations of IC 2497 (2009)
Jozsa, Gyula I. G., Garrett, M. A., Oosterloo, Tom, Rampadarath, H., Paragi, Zsolt, Van Arkel, H., ...
We present multi-wavelength radio observations in the direction of the spiral galaxy IC 2497 and the neighbouring emission nebula known as "Hanny's Voorwerp". Our WSRT continuum observations at 1.4...
Revealing Hanny's Voorwerp: radio observations of IC 2497 (2009)
Jozsa, Gyula I. G., Garrett, M. A., Oosterloo, Tom, Rampadarath, H., Paragi, Zsolt, Van Arkel, H., ...
We present multi-wavelength radio observations in the direction of the spiral galaxy IC 2497 and the neighbouring emission nebula known as "Hanny's Voorwerp". Our WSRT continuum observations at 1.4...
Received; accepted Submitted to the Astronomical Journal (2007)
William C. Keel, Raymond E. White Iii
We present analysis of WFPC2 imaging of two spiral galaxies partially backlit by E/S0 systems in the pairs AM1316-241 and AM0500-620, as well as the (probably spiral) foreground system in NGC 1275....
Donovan Domingue William, William C. Keel, Stuart D. Ryder, Raymond E. White Iii
The detailed distribution of dust in the disks of spiral galaxies is important to understanding the radiative transfer within disks, and to measuring overall dust masses if significant quantities of...
Observations of high-redshift galaxies in the emitted-wavelength regime around Lyman ff have renewed interest in the appearance of normal galaxies in the deep ultraviolet. This paper presents...
Seeing Galaxies though Thick and Thin. (2007)
Iv The Superimposed, William C. Keel, Raymond E. White Iii
The superimposed pair of spiral galaxies comprising NGC 3314 offers a unique opportunity to trace the dust properties in a spiral galaxy. We analyze multicolor HST imaging, supported by ground-based...
The Spiral Host Galaxy of the Double Radio Source 0313-192 (2006)
Keel, William C., White III, Raymond E., Owen, Frazer N., Ledlow, Michael J.
We present new Hubble, Gemini-S, and Chandra observations of the radio galaxy 0313-192, which hosts a 350-kpc double source and jets, even though previous data have suggested that it is a spiral...
Stellar abundances and molecular hydrogen in high-redshift galaxies -the far-ultraviolet view (2006)
FUSE spectra of star-forming regions in nearby galaxies are compared to composite spectra of Lyman-break galaxies (LBGs), binned by strength of Lyman alpha emission and by mid-UV luminosity. Several...
An Atlas of Warm AGN and Starbursts from the IRAS Deep Fields (2005)
Keel, William C., Irby, Bryan K., May, Alana, Miley, George K., Golombek, Daniel, De Grijp, M. H. K., ...
We present 180 AGN candidates based on color selection from the IRAS slow-scan deep observations, with color criteria broadened from the initial Point-Source Catalog samples to include similar...
Escape of Lyman alpha Emission in the Starburst Galaxy Mkn 357 - a Wind's Far Side (2004)
HST imaging and slitless spectroscopy are used to examine where the strong Lyman alpha emission escapes from the interstellar medium in the starburst galaxy Mkn 357. An H-alpha image shows that the...
The Dynamics of Abell 2125 (2004)
Miller, Neal A., Owen, Frazer N., Hill, John M., Keel, William C., Ledlow, Michael J., Oegerle, William R.
We present 371 galaxy velocities in the field of the very rich cluster Abell 2125 (z~0.25). These were determined using optical spectroscopy collected over several years from both the WIYN 3.5m...
Keel, William C., Holberg, Jay B., Treuthardt, Patrick M.
We present FUSE spectroscopy and supporting data for star-forming regions in nearby galaxies, to examine their massive-star content and explore the use of abundance and population indicators in this...
Massive star clusters in ongoing galaxy interactions -- clues to cluster formation (2003)
Keel, William C., Borne, Kirk D.
We present HST WFPC2 observations, supplemented by ground-based H-alpha data, of the star-cluster populations in two pairs of interacting galaxies, selected for being in very different kinds of...
The Infrared Counterparts of the Optically Unidentified CDF-S 1Ms Sources (2002)
Yan, Haojing, Windhorst, Rogier A., Rottgering, Huub J. A., Cohen, Seth H., Odewahn, Stephen C., Chapman, Scott C., ...
The Chandra Deep Field South (CDF-S) 1Ms exposure produced a catalog of 346 X-ray sources, of which 59 were not visible on the VLT/FORS1 and the ESO-MPI/WFI deep R-band images to a limit of...
A Simple Prediction on the Surface Density of Galaxies at z ~ 6 (2002)
Yan, Haojing, Windhorst, Rogier A., Odewahn, Stephen C., Cohen, Seth H., Rottgering, Huub J. A., Keel, William C.
Systematic surveys are being proposed to discover a significant number of galaxies at z ~ 6, which is now suggested as the epoch when the reionization era of the Universe ends. To plan such surveys,...
Morrison, Glenn E., Frazer, N. Owen, Ledlow, Michael J., Keel, William C., Hill, John M., Voges, Wolfgang
Seeing Galaxies though Thick and Thin. IV. The Superimposed Spiral Galaxies of NGC 3314 (2001)
Keel, William C., White III, Raymond E.
The superimposed pair of spiral galaxies NGC 3314 offers a unique opportunity to trace the dust properties in a spiral galaxy. We analyze multicolor HST imaging, supported by ground-based near-IR...
Seeing Galaxies Through Thick & Thin. III. HST Imaging of the Dust in Backlit Spiral Galaxies (2000)
Keel, William C., White III, Raymond E.
We present analysis of WFPC2 imaging of two spiral galaxies partially backlit by E/S0 systems in the pairs AM1316-241 and AM0500-620, and the spiral foreground system in NGC 1275. Images in B and I...
Ultraviolet Signposts of Resonant Dynamics in the Starburst-Ringed Sab Galaxy, M94 (NGC 4736) (2000)
Waller, William H., Fanelli, Michael N., Keel, William C., Bohlin, Ralph, Collins, Nicholas R., Madore, Barry F., ...
M94 (NGC 4736) is investigated using images from the Ultraviolet Imaging Telescope (FUV-band), Hubble Space Telescope (NUV-band), Kitt Peak 0.9-m telescope (H-alpha, R, and I bands), and Palomar 5-m...
Domingue, Donovan L., Keel, William C., White III, Raymond E.
We use slit spectroscopy of overlapping pairs of galaxies to directly determine the extinction in disks of foreground spiral galaxies. The Doppler shifts of pair members are determined via...
Evidence for Large-Scale Structure at z=2.4 From Lyman-alpha Imaging (1999)
Keel, William C., Cohen, Seth H., Windhorst, Rogier A., Waddington, Ian
We present deep wide-field medium-band imaging in redshifted Lyman alpha of fields surrounding HST detections of faint emitters, to characterize their larger-scale environment. The radio galaxy...
Domingue, Donovan L., Keel, William C., Ryder, Stuart D., White III, Raymond E.
The detailed distribution of dust in the disks of spiral galaxies is important to understanding the radiative transfer within disks, and to measuring overall dust masses if significant quantities of...
Compact Lyman-alpha Emitting Candidates at z~2.4 in Deep Medium-band HST WFPC2 Images (1998)
Pascarelle, Sebastian M., Windhorst, Rogier A., Keel, William C.
Medium-band imaging with HST/WFPC2 in the F410M filter has previously revealed a population of compact Lyman-alpha emission objects around the radio galaxy 53W002 at z~2.4. We report detections of...
Deep HST/PC Images of a Young Radio Galaxy at z=2.390 (1997)
Windhorst, Rogier A., Keel, William C., Pascarelle, Sebastian M.
We present deep 63-orbit HST/PC images at ~0.06" FWHM resolution in the filters B_450, V_606 & I_814 - as well as in redshifted Lya - of the radio source LBDS 53W002, a compact narrow-line galaxy at...
An Unusual Radio Galaxy in Abell 428: A Large, Powerful FR I Source in a Disk-Dominated Host (1997)
Ledlow, Michael J., Owen, Frazer N., Keel, William C.
We report the discovery of a powerful (~10^{24} Watts/Hz) FR I radio source in a highly flattened disk-dominated galaxy. Half of the radio flux from this source is concentrated within the host...
Gravitational Interactions in Poor Galaxy Groups (1997)
Davis, David S., Keel, William C., Mulchaey, John S., Henning, Patricia A.
We report the results of the spatial analysis of deep ROSAT HRI observations, optical imaging and spectroscopy, and high-resolution VLA H I and continuum imaging of NGC 1961 and NGC 2276. These...
Distribution and Content of Dust in Overlapping Galaxy Systems (1996)
White III, Raymond E., Keel, William C., Conselice, Christopher J.
Partially overlapping galaxies are used to directly determine the effective absorption in spiral galaxy disks. The non-overlapping parts of the galaxies and symmetry considerations are used to...
Pascarelle, Sebastian M., Windhorst, Rogier A., Driver, Simon P., Ostrander, Eric J., Keel, William C.
We report the serendipitous discovery of a group or cluster of young galaxies at $z\simeq$2.40 in a 24-orbit HST/WFPC2 exposure of the field around the weak radio galaxy 53W002. Potential cluster...
Driver, Simon P., Windhorst, Rogier A., Ostrander, Eric J., Keel, William C., Griffiths, Richard E., Ratnatunga, Kavan U.
We determine the morphological mix of field galaxies down to $m_{I}\simeq 24.25$ mag ($m_{B}\sim 26.0$ mag) from a single ultradeep HST WFPC2 image in both the $V_{606}$ and $I_{814}$ filters. In...