J/ApJ/878/11ivo://CDS.VizieR/J/ApJ/878/11doi:10.26093/cds/vizier.18780011CDSZou F.Yang G.Brandt W.N.Xue Y.2021-03-29T06:34:30Z2020-11-30T10:09:23ZCDS support team

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

cds-question@unistra.fractive-galactic-nucleiredshiftedquasarsx-ray-sourcesinfrared-sourcesThe unified model of active galactic nuclei (AGNs) proposes that different AGN optical spectral types are caused by different viewing angles with respect to an obscuring "torus". Therefore, this model predicts that type 1 and type 2 AGNs should have similar host-galaxy properties. We investigate this prediction with 2463 X-ray-selected AGNs in the COSMOS field. We divide our sample into type 1 and type 2 AGNs based on their spectra, morphologies, and variability. We derive their host-galaxy stellar masses (M_*_) through spectral energy distribution (SED) fitting, and we find that the hosts M_*_ of type 1 AGNs tend to be slightly smaller than those of type 2 AGNs by {Delta}logM_*_~0.2dex (~4{sigma} significance). Besides deriving star formation rates (SFRs) from SED fitting, we also utilize far-infrared (FIR) photometry and a stacking method to obtain FIR-based SFRs. We find that the SFRs of type 1 and type 2 sources are similar once their redshifts and X-ray luminosities are controlled. We also investigate the cosmic environment, and we find that the surface number densities (sub-Mpc) and cosmic-web environments (~1-10Mpc) are similar for both populations. In summary, our analyses show that the host galaxies of type 1 and type 2 AGNs have similar SFRs and cosmic environments in general, but the former tend to have a lower M_*_ than the latter. The difference in M_*_ indicates that the AGN unification model is not strictly correct, and both host galaxy and torus may contribute to the optical obscuration of AGNs.2019ApJ...878...11Zhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/878/11CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/284 : COSMOS Multi-Wavelength Photometry Catalog (Capak+, 2007)VIII/103 : Herschel Multi-tiered Extragalactic Survey (Oliver+, 2012)VIII/95 : Herschel Multi-tiered Extragalactic Survey (Oliver+, 2012)J/ApJ/639/37 : AGN Seyfert galaxies and close neighbors (Koulouridis+, 2006)J/A+A/497/635 : XMM-Newton wide-field survey in COSMOS (Cappelluti+, 2009)J/ApJS/184/158 : Chandra COSMOS survey I. (Elvis+, 2009)J/ApJS/184/218 : The zCOSMOS 10k-bright spectroscopic sample (Lilly+, 2009)J/ApJ/716/348 : The XMM-Newton survey of the COSMOS field (Brusa+, 2010)J/A+A/532/A90 : PACS Evolutionary Probe (PEP-DR1) catalogs (Lutz+, 2011)J/ApJ/742/61 : Phot. redshift of AGNs from XMM- and C-COSMOS (Salvato+ 2011)J/MNRAS/427/3103 : COSMOS field supermassive black holes (Bongiorno+, 2012)J/ApJS/201/30 : The Chandra COSMOS survey. III. (Civano+, 2012)J/ApJ/759/139 : Herschel+MIPS photometry of GOODS sources (Kirkpatrick+, 2012)J/ApJ/763/133 : Broad-line AGN with host galaxy colors (Trump+, 2013)J/ApJS/220/12 : FMOS-COSMOS survey III. 0.7<z<2.5 galaxies (Silverman+, 2015)J/ApJ/819/62 : The COSMOS-Legacy Survey (CLS) catalog (Civano+, 2016)J/ApJS/224/24 : The COSMOS2015 catalog (Laigle+, 2016)J/ApJ/817/34 : C-COSMOS Legacy sources multiwavelength cat. (Marchesi+, 2016)J/MNRAS/464/4545 : Gamma Ray Bursts with Swift (2004-2015) (Buchner+, 2017)J/A+A/602/A123 : AGN vs. host galaxy data in COSMOS field (Lanzuisi+, 2017)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/878/11https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/878/11http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/878/11https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/878/11https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/878/11http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/878/11GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/878/11/table1 (Source catalog (table sent by the author))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/878/11/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/878/11/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/878/11/table1?GETtext/xml+votable180.050000true149.41166082.41036520.0055555555555555565/6814 6/27245 27247 27344https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/878/11?format=asciiX-rayInfrareddefaultJ/ApJ/878/11/table1Source catalog (table sent by the author)SimbadNameSimbad column added by the CDSmeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000[149.4/150.8] Right ascension (J2000) from Marchesi+, 2016, J/ApJ/817/34 K-band counterpartdegpos.eq.ra;meta.mainDEJ2000[1.6/2.82] Declination (J2000) from Marchesi+, 2016, J/ApJ/817/34 K-band counterpartdegpos.eq.dec;meta.mainIDSource designation (1)meta.id;meta.maincharz[0.03/6.84] Redshiftsrc.redshiftfloatn_zType of z ("spec"=spectroscopic redshift (1434 occurrences); or "phot")meta.notecharClassAGN classification (2)meta.code.classcharlogLx[39.77/45.56] log rest frame 2-10keV luminosity; in erg/s unitslog(1e-07W)phys.luminosity;em.X-rayfloatlogM[6.5/12.41]? log stellar masslog(solMass)phys.massfloatnullablelogM_BT1[-99/12.2] log type 1 template stellar mass from Buat+ 2015A&A...577A.141B (3)log(solMass)phys.massfloatlogSFR_SED[-5.5/4.4]? log Star Formation Rate from SEDlog(solMass.yr**-1)phys.SFRfloatnullablelogSFR_FIR[-0.6/3.6]? log Star Formation Rate from FIRlog(solMass.yr**-1)phys.SFRfloatnullablelog(1+del)[-1.03/1.1]? Overdensity parameter (1+{delta}) (4)stat.fit.paramfloatnullableWeb[0/2]? Cosmic-web environment (5)src.classfloatnullable