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HerMES: the far-infrared emission from dust-obscured galaxies

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dc.contributorVirginia Techen
dc.contributor.authorCalanog, J. A.en
dc.contributor.authorWardlow, J.en
dc.contributor.authorFu, H.en
dc.contributor.authorCooray, A.en
dc.contributor.authorAssef, R. J.en
dc.contributor.authorBock, J.en
dc.contributor.authorCasey, C. M.en
dc.contributor.authorConley, A.en
dc.contributor.authorFarrah, D.en
dc.contributor.authorIbar, E.en
dc.contributor.authorKartaltepe, J.en
dc.contributor.authorMagdis, G. E.en
dc.contributor.authorMarchetti, L.en
dc.contributor.authorOliver, S. J.en
dc.contributor.authorPerez-Fournon, I.en
dc.contributor.authorRiechers, D. A.en
dc.contributor.authorRigopoulou, D.en
dc.contributor.authorRoseboom, I. G.en
dc.contributor.authorSchulz, B.en
dc.contributor.authorScott, D.en
dc.contributor.authorSymeonidis, M.en
dc.contributor.authorVaccari, M.en
dc.contributor.authorViero, M.en
dc.contributor.authorZemcov, M.en
dc.contributor.departmentPhysicsen
dc.date.accessed2014-02-05en
dc.date.accessioned2014-02-25T13:57:02Zen
dc.date.available2014-02-25T13:57:02Zen
dc.date.issued2013-09en
dc.description.abstractDust-obscured galaxies (DOGs) are an ultraviolet-faint, infrared-bright galaxy population that reside at z similar to 2 and are believed to be in a phase of dusty star-forming and active galactic nucleus (AGN) activity. We present far-infrared (far-IR) observations of a complete sample of DOGs in the 2 deg(2) of the Cosmic Evolution Survey. The 3077 DOGs have < z > = 1.9 +/- 0.3 and are selected from 24 mu m and r(+) observations using a color cut of r(+) -[24] >= 7.5 (AB mag) and S-24 >= 100 mu Jy. Based on the near-IR spectral energy distributions, 47% are bump DOGs (star formation dominated) and 10% are power-law DOGs (AGN-dominated). We use SPIRE far-IR photometry from the Herschel Multi-tiered Extragalactic Survey to calculate the IR luminosity and characteristic dust temperature for the 1572 (51%) DOGs that are detected at 250 mu m (>= 3 sigma). For the remaining 1505 (49%) that are undetected, we perform a median stacking analysis to probe fainter luminosities. Herschel-detected and undetected DOGs have average luminosities of (2.8 +/- 0.4) x 10(12) L-circle dot and (0.77 +/- 0.08) x 10(12) L-circle dot, and dust temperatures of (33 +/- 7) K and (37 +/- 5) K, respectively. The IR luminosity function for DOGs with S-24 >= 100 mu Jy is calculated, using far-IR observations and stacking. DOGs contribute 10%-30% to the total star formation rate (SFR) density of the universe at z = 1.5-2.5, dominated by 250 mu m detected and bump DOGs. For comparison, DOGs contribute 30% to the SFR density for all z = 1.5-2.5 galaxies with S-24 >= 100 mu Jy. DOGs have a large scatter about the star formation main sequence and their specific SFRs show that the observed phase of star formation could be responsible for their total observed stellar mass at z similar to 2.en
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.description.sponsorshipNASAen
dc.description.sponsorshipGAANN fellowshipen
dc.description.sponsorshipNSF CAREER AST-0645427en
dc.description.sponsorshipScience and Technology Facilities Council ST/I000976/1en
dc.description.sponsorshipW. M. Keck Foundationen
dc.identifier.citationJ. A. Calanog et al. 2013. "HerMES: the far-infrared emission from dust-obscured galaxies," ApJ 775 61 doi:10.1088/0004-637X/775/1/61en
dc.identifier.doihttps://doi.org/10.1088/0004-637x/775/1/61en
dc.identifier.issn0004-637Xen
dc.identifier.urihttp://hdl.handle.net/10919/25537en
dc.identifier.urlhttp://iopscience.iop.org/0004-637X/775/1/61/pdf/0004-637X_775_1_61.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: luminosity function, mass functionen
dc.subjectgalaxies: star formationen
dc.subjectinfrared: galaxiesen
dc.subjectsimilar-to 2en
dc.subjectspectral energy-distributionsen
dc.subjectstar-forming galaxiesen
dc.subjectactive galactic nucleusen
dc.subjectdeep-field-southen
dc.subjectspitzer-space-telescopeen
dc.subjectherschel-spire instrumenten
dc.subjecthigh-redshiften
dc.subjectsubmillimeter galaxiesen
dc.subjectmassive galaxiesen
dc.titleHerMES: the far-infrared emission from dust-obscured galaxiesen
dc.title.serialAstrophysical Journalen
dc.typeArticle - Refereeden

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