A near-infrared analysis of the submillimeter background and the cosmic star-formation history

摘要: We use new deep NIR and MIR observations to analyze the 850 ?m image of GOODS-N region. show that much submillimeter background is picked out by sources with H(AB) or 3.6 ?m(AB) < 23.25 (1.8 ?Jy). These contribute an 24 ? 2 Jy deg-2. This a higher fraction measured (31-45 deg-2) than found current 20 cm samples. Roughly one-half these NIR-selected have spectroscopic identifications, we can assign robust photometric redshifts nearly all remaining using their UV SEDs. redshift spectral type information large light comes from z = 0-1.5 responsible intermediate types. Neither elliptical galaxies, which no star formation, nor bluest little dust, significant amount light, despite fact together they comprise approximately half galaxies in sample. The distribution lies well below smaller traced more luminous, radio-selected sources. therefore require revised formation history lower rate at high redshifts. stacking analysis sample relatively flat down ~ 1 total occurs 1.4.