NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-04-24 T23:09:29 PDT
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For refcode 2010ApJ...721..424Z:
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Copyright by American Astronomical Society. Reproduced by permission
2010ApJ...721..424Z Contribution of Lensed SCUBA Galaxies to the Cosmic Infrared Background Zemcov, Michael; Blain, Andrew; Halpern, Mark; Levenson, Louis Abstract. The surface density of submillimeter (sub-mm) galaxies as a function of flux, usually termed the source number counts, constrains models of the evolution of the density and luminosity of starburst galaxies. At the faint end of the distribution, direct detection and counting of galaxies are not possible. However, gravitational lensing by clusters of galaxies allows detection of sources which would otherwise be too dim to study. We have used the largest catalog of sub-mm-selected sources along the line of sight to galaxy clusters to estimate the faint end of the 850 micron number counts; integrating to S = 0.10 mJy, the equivalent flux density at 850 micron is {nu}I_{nu}_ = 0.24 +/- 0.03 nW m^--2^ sr^--1^. This provides a lower limit to the extragalactic far-infrared background and is consistent with direct estimates of the full intensity from the FIRAS. The results presented here can help to guide strategies for upcoming surveys carried out with single-dish sub-mm instruments. Key words: cosmic background radiation, gravitational lensing: strong, submillimeter: galaxies
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