A Population of z > 2 Far-Infrared Herschel-Spire-Selected Starbursts

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dc.contributorVirginia Techen
dc.contributor.authorCasey, C. M.en
dc.contributor.authorBerta, S.en
dc.contributor.authorBethermin, M.en
dc.contributor.authorBock, J.en
dc.contributor.authorBridge, C. R.en
dc.contributor.authorBurgarella, D.en
dc.contributor.authorChapin, E.en
dc.contributor.authorChapman, S. C.en
dc.contributor.authorClements, D. L.en
dc.contributor.authorConley, A.en
dc.contributor.authorConselice, C. J.en
dc.contributor.authorCooray, A.en
dc.contributor.authorFarrah, D.en
dc.contributor.authorHatziminaoglou, E.en
dc.contributor.authorIvison, R. J.en
dc.contributor.authorLe Floc'h, E.en
dc.contributor.authorLutz, D.en
dc.contributor.authorMagdis, G. E.en
dc.contributor.authorMagnelli, B.en
dc.contributor.authorOliver, S. J.en
dc.contributor.authorPage, M. J.en
dc.contributor.authorPozzi, F.en
dc.contributor.authorRigopoulou, D.en
dc.contributor.authorRiguccini, L.en
dc.contributor.authorRoseboom, I. G.en
dc.contributor.authorSanders, D. B.en
dc.contributor.authorScott, D.en
dc.contributor.authorSeymour, N.en
dc.contributor.authorValtchanov, I.en
dc.contributor.authorVieira, J. D.en
dc.contributor.authorViero, M.en
dc.contributor.authorWardlow, J.en
dc.contributor.departmentPhysicsen
dc.date.accessed2014-02-05en
dc.date.accessioned2014-02-25T13:57:03Zen
dc.date.available2014-02-25T13:57:03Zen
dc.date.issued2012-12en
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.en
dc.description.sponsorshipSpace Telescope Science Institute HST-HF-51268.01-Aen
dc.description.sponsorshipW. M. Keck Foundationen
dc.description.sponsorshipNSF AST-0071048en
dc.description.sponsorshipCSA (Canada)en
dc.description.sponsorshipNAOC (China)en
dc.description.sponsorshipCEA (France)en
dc.description.sponsorshipCNES (France)en
dc.description.sponsorshipCNRS (France)en
dc.description.sponsorshipASI (Italy)en
dc.description.sponsorshipMCINN (Spain)en
dc.description.sponsorshipSNSB (Sweden)en
dc.description.sponsorshipSTFC (UK)en
dc.description.sponsorshipUKSA (UK)en
dc.description.sponsorshipNASA (USA)en
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/761/2/139en
dc.identifier.doihttps://doi.org/10.1088/0004-637x/761/2/139en
dc.identifier.issn0004-637Xen
dc.identifier.urihttp://hdl.handle.net/10919/25539en
dc.identifier.urlhttp://iopscience.iop.org/0004-637X/761/2/139/pdf/0004-637X_761_2_139.pdfen
dc.language.isoen_USen
dc.publisherIOP Publishing Ltd.en
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectgalaxies: evolutionen
dc.subjectgalaxies: high-redshiften
dc.subjectgalaxies: starbursten
dc.subjectinfrared: galaxiesen
dc.subjectsubmillimeter: galaxiesen
dc.subjectstar-forming galaxiesen
dc.subjectdeep-field-southen
dc.subjectsubmillimeter-selecteden
dc.subjectgalaxiesen
dc.subjecthigh-redshift galaxiesen
dc.subjectphotometric redshiftsen
dc.subjectultraluminousen
dc.subjectgalaxiesen
dc.subjectformation historyen
dc.subjectmidinfrared spectroscopyen
dc.subjectspace-telescopeen
dc.subjectscuba galaxiesen
dc.titleA Population of z > 2 Far-Infrared Herschel-Spire-Selected Starburstsen
dc.title.serialAstrophysical Journalen
dc.typeArticle - Refereeden

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