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arXiv · 1210.4932

A Population of z>2 Far-Infrared Herschel-SPIRE selected Starbursts

C. M. Casey·S. Berta·M. Béthermin·J. Bock·C. Bridge·D. Burgarella·E. Chapin·S. C. Chapman·D. L. Clements·A. Conley·C. J. Conselice·A. Cooray·D. Farrah·E. Hatziminaoglou·R. J. Ivison·E. Le Floc'h·D. Lutz·G. Magdis·B. Magnelli·S. J. Oliver·M. J. Page·F. Pozzi·D. Rigopoulou·L. Riguccini·I. G. Roseboom·D. B. Sanders·D. Scott·N. Seymour·I. Valtchanov·J. D. Vieira·M. Viero·J. Wardlow
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Abstract

We present spectroscopic observations for a sample of 36 Herschel-SPIRE 250-500um selected galaxies (HSGs) at 2 2 HyLIRGs in the literature which are detected serendipitously or via tailored surveys searching only for high-z HyLIRGs; therefore, we can place lower limits on the contribution of HSGs to the cosmic star formation rate density at (7+-2)x10^(-3)Msun/yr h^3Mpc^(-3) at z~2.5, which is >10% of the estimated total star formation rate density (SFRD) of the Universe from optical surveys. The contribution at z~4 has a lower limit of 3x10^(-3)Msun/yr h^3 Mpc^(-3), ~>20% of the estimated total SFRD. This highlights the importance of extremely infrared-luminous galaxies with high star formation rates to the build-up of stellar mass, even at the earliest epochs.

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C. M. Casey, S. Berta, M. Béthermin, J. Bock, C. Bridge, D. Burgarella, E. Chapin, S. C. Chapman, D. L. Clements, A. Conley, C. J. Conselice, A. Cooray, D. Farrah, E. Hatziminaoglou, R. J. Ivison, E. Le Floc'h, D. Lutz, G. Magdis, B. Magnelli, S. J. Oliver, M. J. Page, F. Pozzi, D. Rigopoulou, L. Riguccini, I. G. Roseboom, D. B. Sanders, D. Scott, N. Seymour, I. Valtchanov, J. D. Vieira, M. Viero, J. Wardlow. 2012-10-17. A Population of z>2 Far-Infrared Herschel-SPIRE selected Starbursts. https://doi.org/10.1088/0004-637x/761/2/139

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