CaltechAUTHORS
Published June 20, 2013 | Version Submitted + Published
Journal Article Open

A Pilot for a Very Large Array H I Deep Field

Creators

  • 1. ROR icon Columbia University
  • 2. ROR icon University of Cape Town
  • 3. ROR icon West Virginia University
  • 4. ROR icon Max Planck Institute for Astronomy
  • 5. ROR icon National Radio Astronomy Observatory
  • 6. ROR icon International Centre for Radio Astronomy Research
  • 7. ROR icon Netherlands Institute for Radio Astronomy
  • 8. ROR icon University of Groningen
  • 9. ROR icon Michigan State University
  • 10. ROR icon University of New Mexico
  • 11. ROR icon University of Wisconsin–Madison
  • 12. ROR icon California Institute of Technology

Abstract

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.

Additional Information

© 2013 American Astronomical Society. Received 2013 March 11; accepted 2013 May 5; published 2013 June 3. We thank ASTRON for hosting us for two very successful busy weeks. This work was in part supported by the National Science Foundation under grant No. 1009476 to Columbia University. This work is partly based on observations made with the NASA Galaxy Evolution Explorer (GALEX) and SDSS. GALEX is operated for NASA by the California Institute of Technology under NASA contract NAS5-98034. The Funding for SDSS-III has been provided by the Alfred P. Sloan Foundation, the Participating Institutions, the National Science Foundation, and the U.S. Department of Energy Office of Science. The full acknowledgement can be found here: http://www.sdss3.org/.

Attached Files

Published - 2041-8205_770_2_L29.pdf

Submitted - 1303.2659v2.pdf

Files

1303.2659v2.pdf

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Additional details

Additional titles

Alternative title
A Pilot for a VLA HI Deep Field

Identifiers

Eprint ID
39858
Resolver ID
CaltechAUTHORS:20130812-090420703

Related works

Describes
http://arxiv.org/abs/1303.2659 (URL)

Funding

NSF
AST-1009476
NASA
NAS5-98034
Alfred P. Sloan Foundation
Department of Energy (DOE)

Dates

Created
2013-08-12
Created from EPrint's datestamp field
Updated
2021-11-09
Created from EPrint's last_modified field

Caltech Custom Metadata

Caltech groups
COSMOS , Infrared Processing and Analysis Center (IPAC)