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dc.contributorVirginia Tech
dc.contributor.authorCasey, C. M.
dc.contributor.authorBerta, S.
dc.contributor.authorBethermin, M.
dc.contributor.authorBock, J.
dc.contributor.authorBridge, C.
dc.contributor.authorBurgarella, D.
dc.contributor.authorChapin, E.
dc.contributor.authorChapman, S. C.
dc.contributor.authorClements, D. L.
dc.contributor.authorConley, A.
dc.contributor.authorConselice, C. J.
dc.contributor.authorCooray, A.
dc.contributor.authorFarrah, D.
dc.contributor.authorHatziminaoglou, E.
dc.contributor.authorIvison, R. J.
dc.contributor.authorle Floc'h, E.
dc.contributor.authorLutz, D.
dc.contributor.authorMagdis, G.
dc.contributor.authorMagnelli, B.
dc.contributor.authorOliver, S. J.
dc.contributor.authorPage, M. J.
dc.contributor.authorPozzi, F.
dc.contributor.authorRigopoulou, D.
dc.contributor.authorRiguccini, L.
dc.contributor.authorRoseboom, I. G.
dc.contributor.authorSanders, D. B.
dc.contributor.authorScott, D.
dc.contributor.authorSeymour, N.
dc.contributor.authorValtchanov, I.
dc.contributor.authorVieira, J. D.
dc.contributor.authorViero, M.
dc.contributor.authorWardlow, J.
dc.identifier.citationC. M. Casey et al. 2012. "A Population of z > 2 Far-Infrared Herschel-Spire-Selected Starbursts," ApJ 761 139 doi:10.1088/0004-637X/761/2/139
dc.description.abstractWe 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 similar to 0.93 deg(2) in six extragalactic legacy fields. Observations were taken with the Keck I Low Resolution Imaging Spectrometer 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. Individual source luminosities range from log(L-IR/L-circle dot) = 12.5-13.6 (corresponding to star formation rates (SFRs) 500-9000M(circle dot) yr(-1), assuming a Salpeter initial mass function), constituting some of the most intrinsically luminous, distant infrared galaxies discovered thus far. We present both individual and composite rest-frame ultraviolet spectra and infrared spectral energy distributions. The selection of these HSGs is reproducible and well characterized across large areas of the sky in contrast to most z > 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 (SFRD) at (7 +/- 2) x 10(-3) M-circle dot yr(-1) h(3) Mpc(-3) at z similar to 2.5, which is > 10% of the estimated total SFRD of the universe from optical surveys. The contribution at z similar to 4 has a lower limit of 3 x 10(-3) M-circle dot yr(-1) h(3) Mpc(-3), greater than or similar to 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.
dc.description.sponsorshipSpace Telescope Science Institute HST-HF-51268.01-A
dc.description.sponsorshipW. M. Keck Foundation
dc.description.sponsorshipNSF AST-0071048
dc.description.sponsorshipCSA (Canada)
dc.description.sponsorshipNAOC (China)
dc.description.sponsorshipCEA (France)
dc.description.sponsorshipCNES (France)
dc.description.sponsorshipCNRS (France)
dc.description.sponsorshipASI (Italy)
dc.description.sponsorshipMCINN (Spain)
dc.description.sponsorshipSNSB (Sweden)
dc.description.sponsorshipSTFC (UK)
dc.description.sponsorshipUKSA (UK)
dc.description.sponsorshipNASA (USA)
dc.publisherIOP Publishing Ltd.
dc.rightsIn Copyrighten
dc.subjectgalaxies: evolution
dc.subjectgalaxies: high-redshift
dc.subjectgalaxies: starburst
dc.subjectinfrared: galaxies
dc.subjectsubmillimeter: galaxies
dc.subjectstar-forming galaxies
dc.subjecthigh-redshift galaxies
dc.subjectphotometric redshifts
dc.subjectformation history
dc.subjectmidinfrared spectroscopy
dc.subjectscuba galaxies
dc.titleA Population of z > 2 Far-Infrared Herschel-Spire-Selected Starbursts
dc.typeArticle - Refereed
dc.title.serialAstrophysical Journal

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