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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 |
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Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
Format: | Article |
Language: | English |
Subjects: | |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
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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. |
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ISSN: | 0004-637X 1538-4357 |
DOI: | 10.1088/0004-637X/761/2/139 |