SPITZER IMAGING OF HERSCHEL-ATLAS GRAVITATIONALLY LENSED SUBMILLIMETER SOURCES

Journal Article · Thu Feb 10 04:00:00 EST 2011 · Astrophysical Journal Letters

DOI:https://doi.org/10.1088/2041-8205/728/1/L4· OSTI ID:21560512

Hopwood, R; Negrello, M ^[1]; Wardlow, J; Cooray, A; Khostovan, A A; Kim, S; Barton, E ^[2]; Da Cunha, E; Cooke, J ^[3]; Burgarella, D ^[4]; Aretxaga, I ^[5]; Auld, R ^[6]; Baes, M ^[7]; Bertoldi, F ^[8]; Bonfield, D G ^[9]; Blundell, R ^[10]; Buttiglione, S ^[11]; Cava, A ^[12]; Clements, D L ^[13]; Dannerbauer, H ^[14]

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1. Department of Physics and Astronomy, Open University, Milton Keynes, MK7 6AA (United Kingdom)
2. Department of Physics and Astronomy, University of California, Irvine, CA 92697 (United States)
3. Department of Physics, University of Crete, Heraklion (Greece)
4. Laboratoire d'Astrophysique de Marseille, OAMP, CNRS, Aix-Marseille Universite (France)
5. Instituto Nacional de Astrofisica, Optica y Electronica, Aptdo. Postal 51 y 216, 72000 Puebla (Mexico)
6. School of Physics and Astronomy, Cardiff University, Cardiff, CF24 3AA (United Kingdom)
7. Sterrenkundig Observatorium, Universiteit Gent, Krijgslaan 281 S9, B-9000 Gent (Belgium)
8. Argenlander Institute for Astronomy, University of Bonn, Auf dem Hugel 71, 53121 Bonn (Germany)
9. Centre for Astrophysics Research, Science and Technology Research Centre, University of Hertfordshire, Herts AL10 9AB (United Kingdom)
10. Harvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138 (United States)
11. INAF, Osservatorio Astronomico di Padova, Vicolo Osservatorio 5, I-35122 Padova (Italy)
12. Instituto de Astrofisica de Canarias, C/Va Lactea s/n, E-38200 La Laguna (Spain)
13. Astrophysics Group, Physics Department, Imperial College London, Prince Consort Road, London SW7 2AZ (United Kingdom)
14. Laboratoire AIM Paris Saclay, CEA-CNRS-Universite, Irfu/Service d'Astrophysique, CEA Saclay, Orme de Merisiers, 91191 Gif-sur-Yvette Cedex (France)

We present physical properties of two submillimeter selected gravitationally lensed sources, identified in the Herschel Astrophysical Terahertz Large Area Survey. These submillimeter galaxies (SMGs) have flux densities >100 mJy at 500 {mu}m, but are not visible in existing optical imaging. We fit light profiles to each component of the lensing systems in Spitzer IRAC 3.6 and 4.5 {mu}m data and successfully disentangle the foreground lens from the background source in each case, providing important constraints on the spectral energy distributions (SEDs) of the background SMG at rest-frame optical-near-infrared wavelengths. The SED fits show that these two SMGs have high dust obscuration with A{sub V} {approx} 4-5 and star formation rates of {approx}100 M{sub sun} yr{sup -1}. They have low gas fractions and low dynamical masses compared with 850 {mu}m selected galaxies.

• OSTI ID: 21560512
• Journal Information: Astrophysical Journal Letters, Journal Name: Astrophysical Journal Letters Journal Issue: 1 Vol. 728; ISSN 2041-8205
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
ENERGY SPECTRA
FLUX DENSITY
GALAXIES
PHYSICAL PROPERTIES
SPECTRA