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The far-infrared/submillimeter properties of galaxies located behind the Bullet cluster.

Rex, M. and Rawle, T.D. and Egami, E. and Pérez-González, P.G. and Zemcov, M. and Aretxaga, I. and Chung, S.M. and Fadda, D. and Gonzalez, A.H. and Hughes, D.H. and Horellou, C. and Johansson, D. and Kneib, J.-P. and Richard, J. and Altieri, B. and Fiedler, A.K. and Pereira, M.J. and Rieke, G.H. and Smail, I. and Valtchanov, I. and Blain, A.W. and Bock, J.J. and Boone, F. and Bridge, C.R. and Clement, B. and Combes, F. and Dowell, C.D. and Dessauges-Zavadsky, M. and Ilbert, O. and Ivison, R.J. and Jauzac, M. and Lutz, D. and Omont, A. and Pelló, R. and Rodighiero, G. and Schaerer, D. and Smith, G.P. and Walth, G.L. and van der Werf, P. and Werner, M.W. and Austermann, J.E. and Ezawa, H. and Kawabe, R. and Kohno, K. and Perera, T.A. and Scott, K.S. and Wilson, G.W. and Yun, M.S. (2010) 'The far-infrared/submillimeter properties of galaxies located behind the Bullet cluster.', Astronomy & astrophysics., 518 . L13.

Abstract

The Herschel Lensing Survey (HLS) takes advantage of gravitational lensing by massive galaxy clusters to sample a population of high-redshift galaxies which are too faint to be detected above the confusion limit of current far-infrared/submillimeter telescopes. Measurements from 100–500 μm bracket the peaks of the far-infrared spectral energy distributions of these galaxies, characterizing their infrared luminosities and star formation rates. We introduce initial results from our science demonstration phase observations, directed toward the Bullet cluster (1E0657-56). By combining our observations with LABOCA 870 μm and AzTEC 1.1 mm data we fully constrain the spectral energy distributions of 19 MIPS 24 μm-selected galaxies which are located behind the cluster. We find that their colors are best fit using templates based on local galaxies with systematically lower infrared luminosities. This suggests that our sources are not like local ultra-luminous infrared galaxies in which vigorous star formation is contained in a compact highly dust-obscured region. Instead, they appear to be scaled up versions of lower luminosity local galaxies with star formation occurring on larger physical scales.

Item Type:Article
Keywords:Infrared, Galaxies, Submillimeter, Evolution, High-redshift, Gravitational lensing.
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Status:Peer-reviewed
Publisher Web site:http://dx.doi.org/10.1051/0004-6361/201014693
Publisher statement:The original publication is available at http://www.afs-journal.org
Record Created:28 May 2013 11:50
Last Modified:21 Jun 2013 11:59

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