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Spitzer Imaging of Herschel-ATLAS Gravitationally Lensed Submillimeter Sources

Hopwood, R. and Cooke, J. and Vieira, J. D. (2011) Spitzer Imaging of Herschel-ATLAS Gravitationally Lensed Submillimeter Sources. Astrophysical Journal Letters, 728 (1). Art. No. L4. ISSN 2041-8205.

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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 μm, 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 μm 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_V ~ 4–5 and star formation rates of ~100M_⊙ yr^(−1). They have low gas fractions and low dynamical masses compared with 850 μm selected galaxies.

Item Type:Article
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Cooke, J.0000-0001-5703-2108
Additional Information:© 2011 The American Astronomical Society. Received 2010 November 22, accepted for publication 2010 December 20. Published 2011 January 18. Herschel-ATLAS is a project with Herschel, which is an ESA space observatory with science instruments provided by European-led Principal Investigator consortia and with important participation from NASA. The H-ATLAS Web site is We thank the Science and Technology Facilities Council, grant D/002400/1 and studentship/SF/ F005288/1. This work is based in part on observations made with the Spitzer Space Telescope, which is operated by the Jet Propulsion Laboratory, California Institute of Technology under a contract with NASA. Support for this work was provided by NASAthrough an award issued by JPL/Caltech.USparticipants in H-ATLAS also acknowledge support from NASA Herschel Science Center through a contract from JPL/Caltech. I.A. and D.H.H. are partially funded by CONACyT grants 50786 and 60878.
Funding AgencyGrant Number
Science and Technology Facilities CouncilD-002400-1
Science and Technology StudentshipSF-F005288-1
NASA Herschel Science CenterUNSPECIFIED
Subject Keywords:galaxies: individual (SDP.81: H-ATLAS J090311.6+003906, SDP.130: H-ATLAS J091305.0-005343); galaxies: starburst; gravitational lensing: strong
Issue or Number:1
Classification Code:PACS: 98.54.Ep; 98.62.Qz; 98.62.Sb; 98.62.Ai
Record Number:CaltechAUTHORS:20110302-102609743
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Official Citation:R. Hopwood et al. 2011 ApJ 728 L4 doi: 10.1088/2041-8205/728/1/L4
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:22604
Deposited By: Ruth Sustaita
Deposited On:03 Mar 2011 17:45
Last Modified:09 Mar 2020 13:18

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