2013ApJ...770L..29F
A Pilot for a Very Large Array H I Deep Field
Fernández, Ximena ( Department of Astronomy, Columbia University, New York, NY 10027, USA ); van Gorkom, J. H. ( Department of Astronomy, Columbia University, New York, NY 10027, USA ); Hess, Kelley M. ( Department of Astronomy, Astrophysics, Cosmology & Gravity Centre, University of Cape Town, Private Bag X3, Rondebosch 7701, South Africa ); Pisano, D. J. ( Department of Physics, West Virginia University, P.O. Box 6315, Morgantown, WV 26506, USA ; Adjunct Assistant Astronomer at National Radio Astronomy Observatory, P.O. Box 2, Green Bank, WV 24944, USA ); Kreckel, Kathryn ( Max Planck Institute for Astronomy, Königstuhl 17, D-69117 Heidelberg, Germany ); Momjian, Emmanuel ( National Radio Astronomy Observatory, Socorro, NM 87801, USA ); Popping, Attila ( International Centre for Radio Astronomy Research (ICRAR), The University of Western Australia, 35 Stirling Hwy, Crawley, WA 6009, Australia ); Oosterloo, Tom ( Netherlands Institute for Radio Astronomy (ASTRON), Postbus 2, NL-7990 AA Dwingeloo, The Netherlands ; Kapteyn Astronomical Institute, University of Groningen, Postbus 800, NL-9700 AV Groningen, The Netherlands ); Chomiuk, Laura ( Department of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA ); Verheijen, M. A. W. ( Kapteyn Astronomical Institute, University of Groningen, Postbus 800, NL-9700 AV Groningen, The Netherlands ); Henning, Patricia A. ( Department of Physics and Astronomy, University of New Mexico, Albuquerque, NM 87131, USA ); Schiminovich, David ( Department of Astronomy, Columbia University, New York, NY 10027, USA ); Bershady, Matthew A. ( Department of Astronomy, University of Wisconsin-Madison, Madison, WI 53706, USA ); Wilcots, Eric M. ( Department of Astronomy, University of Wisconsin-Madison, Madison, WI 53706, USA ); Scoville, Nick ( Department of Astronomy, California Institute of Technology, Pasadena, CA 91125, USA ) and 5 coauthors show affiliations
The Astrophysical Journal Letters, Volume 770, Issue 2, article id. L29, 6 pp. (2013).
Published in Jun 2013
High-resolution 21 cm H I deep fields provide spatially and kinematically resolved images of neutral hydrogen at different redshifts, which are key to understanding galaxy evolution across cosmic time and testing predictions of cosmological simulations. Here we present results from a pilot for an H I deep field done with the Karl G. Jansky Very Large Array (VLA). We take advantage of the newly expanded capabilities of the telescope to probe the redshift interval 0 < z < 0.193 in one observation. We observe the COSMOS field for 50 hr, which contains 413 galaxies with optical spectroscopic redshifts in the imaged field of 34' × 34' and the observed redshift interval. We have detected neutral hydrogen gas in 33 galaxies in different environments spanning the probed redshift range, including three without a previously known spectroscopic redshift. The detections have a range of H I and stellar masses, indicating the diversity of galaxies we are probing. We discuss the observations, data reduction, results, and highlight interesting detections. We find that the VLA's B-array is the ideal configuration for H I deep fields since its long spacings mitigate radio frequency interference. This pilot shows that the VLA is ready to carry out such a survey, and serves as a test for future H I deep fields planned with other Square Kilometer Array pathfinders.
Keywords:
Astronomy: galaxies: evolution; radio lines: galaxies
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