Spitzer Observations of the SCUBA/VLA Sources in the Lockman Hole: Star Formation History of Infrared-Luminous Galaxies

Egami, E.; Dole, H.; Huang, J.-S.; Pérez-Gonzalez, P.; Le Floc'h, E.; Papovich, C.; Barmby, P, P.; Ivison, R. J.;, R.J.; Serjeant, S.; Mortier, A.; Frayer, D.T. and Rigopoulou, D. [et al.] (2004). Spitzer Observations of the SCUBA/VLA Sources in the Lockman Hole: Star Formation History of Infrared-Luminous Galaxies. Astrophysical Journal Supplement Series, 154(1) pp. 130–136.

DOI: https://doi.org/10.1086/423322

URL: http://arxiv.org/abs/astro-ph/0406359

Abstract

We present Spitzer Space Telescope imaging observations at 3.6, 4.5, 5.8, 8.0, and 24 μm of the SCUBA submillimeter sources and μJy VLA radio sources in a 5'×5' 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 (LIR > 1011 Lsolar) 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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