Candidate gravitationally lensed dusty star-forming galaxies in the Herschel wide area surveys

Journal Article · Fri May 20 04:00:00 EDT 2016 · Astrophysical Journal

DOI:https://doi.org/10.3847/0004-637X/823/1/17· OSTI ID:22869070

Nayyeri, H.; Keele, M.; Cooray, A. ^[1]; Riechers, D. A. ^[2]; Ivison, R. J. ^[3]; Harris, A. I. ^[4]; Frayer, D. T. ^[5]; Baker, A. J. ^[6]; Chapman, S. C. ^[7]; Eales, S. ^[8]; Farrah, D. ^[9]; Fu, H. ^[10]; Marchetti, L. ^[11]; Marques-Chaves, R.; Martinez-Navajas, P. I.; Perez-Fournon, I. ^[12]; Oliver, S. J. ^[13]; Omont, A. ^[14]; Scott, D. ^[15]; Vaccari, M. ^[16] ; others, and

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1. Department of Physics and Astronomy, University of California, Irvine, CA 92697 (United States)
2. Department of Astronomy, Cornell University, Ithaca, NY 14853 (United States)
3. European Southern Observatory, Karl-Schwarzschild-Strasse 2, D-85748 Garching (Germany)
4. Department of Astronomy University of Maryland College Park, MD 20742 (United States)
5. National Radio Astronomy Observatory, Green Bank, WV 24944 (United States)
6. Department of Physics and Astronomy, Rutgers, the State University of New Jersey, 136 Frelinghuysen Road, Piscataway, NJ 08854-8019 (United States)
7. Institute of Astronomy, University of Cambridge, Madingley Road, Cambridge, CB3 0HA (United Kingdom)
8. School of Physics and Astronomy, Cardiff University, Cardiff (United Kingdom)
9. Department of Physics, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061 (United States)
10. Department of Physics and Astronomy, University of Iowa, Iowa City, IA 52242 (United States)
11. Department of Physical Sciences, The Open University, Milton Keynes, MK7 6AA (United Kingdom)
12. Instituto de Astrofisica de Canarias, E-38205 La Laguna, Tenerife (Spain)
13. Department of Physics and Astronomy, University of Sussex, Brighton BN1 9QH (United Kingdom)
14. Institut d’Astrophysique de Paris, UMR 7095 CNRS, Université Pierre et Marie Curie, 75014, Paris (France)
15. Department of Physics and Astronomy, University of British Columbia, 2329 West Mall, Vancouver, BC V6T 1Z4 (Canada)
16. Department of Physics and Astronomy, University of the Western Cape, Robert Sobukwe Road, 7535 Bellville, Cape Town (South Africa)

We present a list of candidate gravitationally lensed dusty star-forming galaxies (DSFGs) from the HerMES Large Mode Survey and the Herschel Stripe 82 Survey. Together, these partially overlapping surveys cover 372 deg{sup 2} on the sky. After removing local spiral galaxies and known radio-loud blazars, our candidate list of lensed DSFGs is composed of 77 sources with 500 μm flux densities (S {sub 500}) greater than 100 mJy. Such sources are dusty starburst galaxies similar to the first bright sub-millimeter galaxies (SMGs) discovered with SCUBA. We expect a large fraction of this list to be strongly lensed, with a small fraction made up of bright SMG–SMG mergers that appear as hyper-luminous infrared galaxies (L{sub IR}>10{sup 13} L{sub ⊙}). Thirteen of the 77 candidates have spectroscopic redshifts from CO spectroscopy with ground-based interferometers, putting them at z>1 and well above the redshift of the foreground lensing galaxies. The surface density of our sample is 0.21 ± 0.03 deg{sup −2}. We present follow-up imaging of a few of the candidates to confirm their lensing nature. The sample presented here is an ideal tool for higher-resolution imaging and spectroscopic observations to understand the detailed properties of starburst phenomena in distant galaxies.

• OSTI ID: 22869070
• Journal Information: Astrophysical Journal, Journal Name: Astrophysical Journal Journal Issue: 1 Vol. 823; ISSN ASJOAB; ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
CARBON MONOXIDE
DENSITY
FLUX DENSITY
GALAXIES
GRAVITATIONAL LENSES
INTERFEROMETERS
RED SHIFT
RESOLUTION
SPECTROSCOPY
STARS
SURFACES