DISCOVERY OF A MULTIPLY LENSED SUBMILLIMETER GALAXY IN EARLY HerMES HERSCHEL/SPIRE DATA

Journal Article · Tue May 10 04:00:00 EDT 2011 · Astrophysical Journal Letters

DOI:https://doi.org/10.1088/2041-8205/732/2/L35· OSTI ID:21562687

Conley, A ^[1]; Cooray, A; Kim, S; Amblard, A ^[2]; Vieira, J D; Blain, A; Bock, J; Bradford, C M; Bridge, C; Carpenter, J M ^[3]; Solares, E A. Gonzalez ^[4]; Aguirre, J E ^[5]; Auld, R ^[6]; Baker, A J ^[7]; Beelen, A ^[8]; Blundell, R ^[9]; Brisbin, D ^[10]; Burgarella, D ^[11]; Chanial, P ^[12]; Chapin, E ^[13]

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1. Center for Astrophysics and Space Astronomy, 389 UCB, University of Colorado, Boulder, CO 80309 (United States)
2. Department of Physics and Astronomy, University of California, Irvine, CA 92697 (United States)
3. California Institute of Technology, 1200 E. California Blvd., Pasadena, CA 91125 (United States)
4. Institute of Astronomy, University of Cambridge, Madingley Road, Cambridge CB3 0HA (United Kingdom)
5. Department of Physics and Astronomy, University of Pennsylvania, Philadelphia, PA 19104 (United States)
6. Cardiff School of Physics and Astronomy, Cardiff University, Queens Buildings, The Parade, Cardiff CF24 3AA (United Kingdom)
7. Department of Physics and Astronomy, Rutgers, The State University of New Jersey, 136 Frelinghuysen Rd, Piscataway, NJ 08854 (United States)
8. Institut d'Astrophysique Spatiale (IAS), batiment 121, Universite Paris-Sud 11 and CNRS (UMR 8617), 91405 Orsay (France)
9. Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138 (United States)
10. Space Science Building, Cornell University, Ithaca, NY 14853-6801 (United States)
11. Laboratoire d'Astrophysique de Marseille, OAMP, Universite Aix-marseille, CNRS, 38 rue Frederic Joliot-Curie, 13388 Marseille cedex 13 (France)
12. Laboratoire AIM-Paris-Saclay, CEA/DSM/Irfu-CNRS-Universite Paris Diderot, CE-Saclay, pt courrier 131, F-91191 Gif-sur-Yvette (France)
13. Department of Physics and Astronomy, University of British Columbia, 6224 Agricultural Road, Vancouver, BC V6T 1Z1 (Canada)

We report the discovery of a bright (f(250 {mu}m)>400 mJy), multiply lensed submillimeter galaxy HERMES J105751.1+573027 in Herschel/SPIRE Science Demonstration Phase data from the HerMES project. Interferometric 880 {mu}m Submillimeter Array observations resolve at least four images with a large separation of {approx}9''. A high-resolution adaptive optics K{sub p} image with Keck/NIRC2 clearly shows strong lensing arcs. Follow-up spectroscopy gives a redshift of z = 2.9575, and the lensing model gives a total magnification of {mu} {approx} 11 {+-} 1. The large image separation allows us to study the multi-wavelength spectral energy distribution (SED) of the lensed source unobscured by the central lensing mass. The far-IR/millimeter-wave SED is well described by a modified blackbody fit with an unusually warm dust temperature, 88 {+-} 3 K. We derive a lensing-corrected total IR luminosity of (1.43 {+-} 0.09) x 10{sup 13} L{sub sun}, implying a star formation rate of {approx}2500 M{sub sun} yr{sup -1}. However, models primarily developed from brighter galaxies selected at longer wavelengths are a poor fit to the full optical-to-millimeter SED. A number of other strongly lensed systems have already been discovered in early Herschel data, and many more are expected as additional data are collected.

• OSTI ID: 21562687
• Journal Information: Astrophysical Journal Letters, Journal Name: Astrophysical Journal Letters Journal Issue: 2 Vol. 732; ISSN 2041-8205
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
ENERGY SPECTRA
GALAXIES
IMAGES
LUMINOSITY
OPTICAL PROPERTIES
PHYSICAL PROPERTIES
SPECTRA