SPITZER Observations of the SCUBA/VLA Sources in the Lockman Hole: Star   Formation History of Infrared-Luminous Galaxies
  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. 
E.Egami, H.Dole, J.-S.Huang, P.Perez-Gonzalez, E.Le Floc'h,   C.Papovich, P.Barmby, R.J.Ivison, S.Serjeant, A.Mortier, D.T.F...