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A POPULATION OF z > 2 FAR-INFRARED HERSCHEL-SPIRE-SELECTED STARBURSTS

We present spectroscopic observations for a sample of 36 Herschel-SPIRE 250-500 [mu]m selected galaxies (HSGs) at 2 > z < 5 from the Herschel Multi-tiered Extragalactic Survey. Redshifts are confirmed as part of a large redshift survey of Herschel-SPIRE-selected sources covering ~0.93 deg supe...

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Published in:The Astrophysical journal 2012-12, Vol.761 (2), p.1-24
Main Authors: CASEY, C. M, BERTA, S, CONSELICE, C. J, COORAY, A, FARRAH, D, HATZIMINAOGLOU, E, IVISON, R. J, LEFLOC'H, E, LUTZ, D, MAGDIS, G, MAGNELLI, B, OLIVER, S. J, BETHERMIN, M, PAGE, M. J, POZZI, F, RIGOPOULOU, D, RIGUCCINI, L, ROSEBOOM, I. G, SANDERS, D. B, SCOTT, Douglas, SEYMOUR, N, VALTCHANOV, I, VIEIRA, J. D, BOCK, J, VIERO, M, WARDLOW, J, BRIDGE, C, BURGARELLA, D, CHAPIN, E, CHAPMAN, S. C, CLEMENTS, D. L, CONLEY, A
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Language:English
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Summary:We present spectroscopic observations for a sample of 36 Herschel-SPIRE 250-500 [mu]m selected galaxies (HSGs) at 2 > z < 5 from the Herschel Multi-tiered Extragalactic Survey. Redshifts are confirmed as part of a large redshift survey of Herschel-SPIRE-selected sources covering ~0.93 deg super(2) in six extragalactic legacy fields. Observations were taken with the Keck I Low Resolution Imaging Speedometer and the Keck II DEep Imaging Multi-Object Spectrograph. Precise astrometry, needed for spectroscopic follow-up, is determined by identification of counterparts at 24 [mu]m or 1.4 GHz using a cross-identification likelihood matching method. We present both individual and composite rest-frame ultraviolet spectra and infrared spectral energy distributions. The contribution at z ~ 4 has a lower limit of 3 x 10 super(-3) M sub([middot in circle]) yr super(-1) h3 Mpc super(-3), [gap]20% of the estimated total SFRD. This highlights the importance of extremely infrared-luminous galaxies with high SFRs to the buildup of stellar mass, even at the earliest epochs.
ISSN:0004-637X
1538-4357
DOI:10.1088/0004-637X/761/2/139