Ximena Fernández, Hansung B. Gim, J. H.Van Gorkom, Min S. Yun, Emmanuel Momjian, Attila Popping, Laura Chomiuk, Kelley M. Hess, Lucas Hunt, Kathryn Kreckel, Danielle Lucero, Natasha Maddox, Tom Oosterloo, D. J. Pisano, M. A.W. Verheijen, Christopher A. Hales, Aeree Chung, Richard Dodson, Kumar Golap, Julia GrossPatricia Henning, John Hibbard, Yara L. Jaffé, Jennifer Donovan Meyer, Martin Meyer, Monica Sanchez-Barrantes, David Schiminovich, Andreas Wicenec, Eric Wilcots, Matthew Bershady, Nick Scoville, Jay Strader, Evangelia Tremou, Ricardo Salinas, Ricardo Chávez

Research output: Contribution to journalArticlepeer-review

45 Citations (Scopus)


Our current understanding of galaxy evolution still has many uncertainties associated with the details of the accretion, processing, and removal of gas across cosmic time. The next generation of radio telescopes will image the neutral hydrogen (H i) in galaxies over large volumes at high redshifts, which will provide key insights into these processes. We are conducting the COSMOS H i Large Extragalactic Survey (CHILES) with the Karl G. Jansky Very Large Array, which is the first survey to simultaneously observe H i from z = 0 to z ∼ 0.5. Here, we report the highest redshift H i 21 cm detection in emission to date of the luminous infrared galaxy COSMOS J100054.83+023126.2 at z = 0.376 with the first 178 hr of CHILES data. The total H i mass is (2.9 ± 1.0) × 1010 M o and the spatial distribution is asymmetric and extends beyond the galaxy. While optically the galaxy looks undisturbed, the H i distribution suggests an interaction with a candidate companion. In addition, we present follow-up Large Millimeter Telescope CO observations that show it is rich in molecular hydrogen, with a range of possible masses of (1.8-9.9) × 1010 M o. This is the first study of the H i and CO in emission for a single galaxy beyond z ∼ 0.2.

Original languageEnglish
Article numberL1
JournalAstrophysical Journal Letters
Issue number1
Publication statusPublished - 2016 Jun 10

Bibliographical note

Funding Information:
We acknowledge useful discussions with Andrew Baker and George Privon. CHILES is supported by NSF grants AST-1413102, AST-1412578, AST-1412843, AST-1413099 and AST-1412503. X.F. is supported by an NSF-AAPF under award AST-1501342. L. C. and E.T. acknowledge support from NSF grant AST-1412549.

Publisher Copyright:
© 2016. The American Astronomical Society. All rights reserved..

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

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