J/ApJ/806/L35ivo://CDS.VizieR/J/ApJ/806/L35doi:10.26093/cds/vizier.18069035CDSKartaltepe J.S.Sanders D.B.Silverman J.D.Kashino D.Chu J.,Zahid H.Hasinger G.Kewley L.Matsuoka K.Nagao T.Riguccini L.,Salvato M.Schawinski K.Taniguchi Y.Treister E.Capak P.Daddi E.,Ohta K.2017-11-29T11:48:40Z2015-11-19T12:54:47ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.frgalaxiesinfrared-sourcesredshiftedinfrared-astronomyspectroscopyx-ray-sourcesWe have used FMOS on Subaru to obtain near-infrared spectroscopy of 123 far-infrared-selected galaxies in COSMOS and the key rest-frame optical emission lines. This is the largest sample of infrared galaxies with near-infrared spectroscopy at these redshifts. The far-infrared selection results in a sample of galaxies that are massive systems that span a range of metallicities in comparison with previous optically selected surveys, and thus has a higher active galactic nucleus (AGN) fraction and better samples the AGN branch. We establish the presence of AGNs and starbursts in this sample of (U)LIRGs selected as Herschel-PACS and Spitzer-MIPS detections in two redshift bins (z~0.7 and z~1.5) and test the redshift dependence of diagnostics used to separate AGNs from star formation dominated galaxies. In addition, we construct a low-redshift (z~0.1) comparison sample of infrared-selected galaxies and find that the evolution from z~1.5 to today is consistent with an evolving AGN selection line and a range of ISM conditions and metallicities from the models of Kewley et al. (2013ApJ...774L..10K). We find that a large fraction of (U)LIRGs are BPT-selected AGNs using their new redshift-dependent classification line. We compare the position of known X-ray-detected AGNs (67 in total) with the BPT selection and find that the new classification line accurately selects most of these objects (>70%). Furthermore, we identify 35 new (likely obscured) AGNs not selected as such by their X-ray emission. Our results have direct implications for AGN selection at higher redshift with either current (MOSFIRE, KMOS) or future (PFS, MOONS) spectroscopic efforts with near-infrared spectral coverage.2015ApJ...806L..35Khttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/806/L35CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toVIII/95 : Herschel Multi-tiered Extragalactic Survey (Oliver+, 2012)VII/265 : COSMOS Morphological Catalog (V1.1) (Tasca+ 2009)II/284 : COSMOS Multi-Wavelength Photometry Catalog (Capak+, 2007)J/MNRAS/428/1128 : UDS/COSMOS HiZELS galaxies (Sobral+, 2013)J/ApJS/201/30 : The Chandra COSMOS survey. III. (Civano+, 2012)J/A+A/532/A90 : PACS Evolutionary Probe (PEP-DR1) catalogs (Lutz+, 2011)J/ApJ/721/98 : Morphology of 70um COSMOS galaxies (Kartaltepe+, 2010)J/ApJ/716/348 : The XMM-Newton survey of the COSMOS field (Brusa+, 2010)J/ApJ/709/884 : Role of starburst-AGN composites in LIRG mergers (Yuan+, 2010)J/ApJ/709/572 : COSMOS 70um sources (Kartaltepe+, 2010)J/ApJ/696/1195 : COSMOS AGN spectroscopic survey. I. (Trump+, 2009)J/ApJS/184/158 : Chandra COSMOS survey I. (Elvis+, 2009)J/ApJS/172/70 : zCOSMOS-bright catalog (Lilly+, 2007)J/ApJS/172/29 : XMM-Newton survey in COSMOS field. I. (Hasinger+, 2007)J/ApJ/660/167 : Spitzer AGN candidates in CDFN (Donley+, 2007)J/ApJS/143/315 : Ultraluminous galaxies IRAS 1Jy sample. II. (Veilleux+, 2002)http://wwwmpa.mpa-garching.mpg.de/SDSS/DR7/ : MPA-JHU DR7 releasehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/806/L35https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/806/L35http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/806/L35https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/806/L35https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/806/L35http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/806/L35GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/806/L35/table2 (IR-selected Subaru/FMOS source properties)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/806/L35/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/806/L35/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/806/L35/table2?GETtext/xml+votable180.050000true150.238332.05619410.0055555555555555565/6814 6/27247https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/806/L35?format=asciiOpticalInfraredX-raydefaultJ/ApJ/806/L35/table2IR-selected Subaru/FMOS source propertiesSimbadNameSimbad column added by the CDSmeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintCOSMOSSource identifier (JHHMMSS.sss+DDMMSS.ss)meta.id;meta.maincharRAJ2000Right Ascension in decimal degrees (J2000)degpos.eq.ra;meta.mainDEJ2000Declination in decimal degrees (J2000)degpos.eq.dec;meta.mainz[0.5/1.7] Spectroscopic redshiftsrc.redshiftfloatlogLIR[10.7/13] Log MIR-FIR SED luminosity (1)log(solLum)phys.luminosity;em.IRfloatlogLX[42.5/45.2]? Log Chandra 2-10keV X-ray luminosity; erg/slog(1e-07W)phys.luminosity;em.X-rayfloatnullableN2/Ha[-1.2/0.2] The [NII](6548,6584) to H{alpha} ratiospect.line.intensity;arith.ratiodoubleO3/Hb[-1.5/1.4] The [OIII](4959,5007) to H{beta} ratiospect.line.intensity;arith.ratiodoubleIR-AGN?[0/1] An IR identified AGN? (1=yes)meta.codeintBPT-AGN?[0/1] Baldwin, Phillips & Terlevich 1981PASP...93....5B identified AGN? (1=yes)meta.codeintCCatDisplay the sources within 1" from Elvis+, 2009, J/ApJS/184/158 and Trump+, 2009, J/ApJ/696/1195meta.ref.urlintnullable