Spitzer Observations of the SCUBA/VLA Sources in the Lockman Hole: Star Formation History of Infrared‐Luminous Galaxies
The Astrophysical Journal Supplement Series2004Vol. 154(1), pp. 130–136
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Eiichi Egami, H. Dole, J. S. Huang, Pablo G. Pérez‐González, E. Le Floc’h, Casey Papovich, P. Barmby, R. J. Ivison, S. Serjeant, A. M. J. Mortier, D. T. Frayer, D. Rigopoulou, G. Lagache, G. H. Rieke, S. P. Willner, A. Alonso‐Herrero, Lina Bai, C. W. Engelbracht, G. G. Fazio, Karl D. Gordon, Dean C. Hines, K. A. Misselt, Satoshi Miyazaki, Jane Morrison, Marcia Rieke, Jane R. Rigby, Gillian Wilson
Abstract
We present Spitzer IRAC (3.6, 4.5, 5.8, 8.0 um) and MIPS (24 um) observations of the SCUBA submillimeter sources and uJy VLA radio sources in a 5'x5' area in the Lockman Hole East region. Out of the ~40 SCUBA/VLA sources in the field, Spitzer counterparts were detected for nearly all except for the few low-weight SCUBA detections. We show that the majority (80-90%) of the detected sources are cold (i.e., starburst-like) infrared-luminous galaxies (L_{IR} > 10^{11} Lsun) at redshift 0.5<z<3.5, whose star-formation rate density (SFRD) is comparable to that of the optically-selected star-forming galaxies.
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