J/MNRAS/427/3103ivo://CDS.VizieR/J/MNRAS/427/3103doi:10.26093/cds/vizier.74273103CDSBongiorno A.Merloni A.Brusa M.Magnelli B.Salvato M.Mignoli M.,Zamorani G.Fiore F.Rosario D.Mainieri V.Hao H.Comastri A.,Vignali C.Balestra I.Bardelli S.Berta S.Civano F.Kampczyk P.,Le Floc'h E.Lusso E.Lutz D.Pozzetti L.Pozzi F.Riguccini L.,Shankar F.Silverman J.2024-07-19T20:17:10Z2018-12-12T12:57:24ZCDS support team

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

cds-question@unistra.frsurveysx-ray-sourcesredshiftedUsing the wide multiband photometry available in the Cosmic Evolution Survey (COSMOS) field, we explore the host galaxy properties of a large sample of active galactic nuclei (AGNs; ~1700 objects) with L_bol_ranging from 10^43^ to 10^47^erg/s, obtained by combining X-ray and optical spectroscopic selections. Based on a careful study of their spectral energy distributions, which have been parametrized using a two-component (AGN+galaxy) model fit, we have derived dust-corrected rest-frame magnitudes, colours and stellar masses of the obscured and unobscured AGN hosts up to high redshift (z<~3). Moreover, for the sample of obscured AGNs, we have also derived reliable star formation rates (SFRs). We find that AGN hosts span a large range of stellar masses and SFRs. No colour-bimodality is seen at any redshift in the AGN hosts, which are found to be mainly massive, red galaxies. Once we have accounted for the colour-mass degeneracy in well-defined mass-matched samples, we find a residual (marginal) enhancement of the incidence of AGNs in redder galaxies with lower specific SFRs. We argue that this result might emerge because of our ability to properly account for AGN light contamination and dust extinction, compared to surveys with a more limited multiwavelength coverage. However, because these colour shifts are relatively small, systematic effects could still be considered responsible for some of the observed trends. Interestingly, we find that the probability for a galaxy to host a black hole that is growing at any given `specific accretion rate' (i.e. the ratio of X-ray luminosity to the host stellar mass) is almost independent of the host galaxy mass, while it decreases as a power law with L_X_/M_*_. By analysing the normalization of such a probability distribution, we show how the incidence of AGNs increases with redshift as rapidly as (1 + {\em z})^4^, which closely resembles the overall evolution of the specific SFR of the entire galaxy population. We provide analytical fitting formulae that describe the probability of a galaxy of any mass (above the completeness limit of the COSMOS) to host an AGN of any given specific accretion rate as a function of redshift. These can be useful tools for theoretical studies of the growing population of black holes within galaxy evolution models. Although AGN activity and star formation in galaxies do appear to have a common triggering mechanism, at least in a statistical sense, within the COSMOS sample, we do not find any conclusive evidence to suggest that AGNs have a powerful influence on the star-forming properties of their host galaxies.2012MNRAS.427.3103Bhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/427/3103CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/ApJS/184/218 : The zCOSMOS 10k-bright spectroscopic sample (Lilly+, 2009)J/A+A/497/635 : XMM-Newton wide-field survey in COSMOS fieldJ/ApJ/690/1236 : COSMOS photometric redshift catalog (Ilbert+, 2009)J/A+A/510/A56 : zCOSMOS type-2 AGN (Bongiorno, 2010)J/ApJ/716/348 : The XMM-Newton survey of the COSMOS field (Brusa+, 2010)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/427/3103https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/427/3103http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/427/3103https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/427/3103https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/427/3103http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/427/3103GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/427/3103/sample (Source identification (table C1) and parameters derived from the SED fitting (table C2))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/427/3103/sample?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/427/3103/sample?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/427/3103/sample?GETtext/xml+votable180.050000true150.105211.9811820.0055555555555555565/6814 6/27245 27247 273442.0401237512456292e-19 2.706461185444514e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/427/3103?format=asciiX-raydefaultJ/MNRAS/427/3103/sampleSource identification (table C1) and parameters derived from the SED fitting (table C2)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintXMM-ID? XMM ID from Cappelluti et al. (2009, Cat. J/A+A/497/635, XMMC NNNNNN in Simbad)meta.idintnullablezC-ID_BPT? zCOSMOS ID (Lilly et al., 2009, Cat. J/ApJS/184/218) when the object is in the BPT selected sample (Bongiorno et al., 2010, Cat. J/A+A/510/A56)meta.idintnullablezC-ID_NeV? zCOSMOS ID (Lilly et al., 2009, Cat. J/ApJS/184/218) when the object is in the NeV-selected sample (Mignoli et al., in preparation)meta.idintnullablePHOT-ID? Photometric ID from Ilbert et al. (2009, Cat. J/ApJ/690/1236, [ICS2009] NNNNNNN in Simbad)meta.id;meta.mainintnullableRAJ2000Right ascension (J2000)degpos.eq.ra;meta.mainDEJ2000Declination (J2000)degpos.eq.dec;meta.mainImag? HST F814W filter AB magnitudemagphot.mag;em.opt.Ifloatnullablezspec? Spectroscopic redshiftsrc.redshiftfloatnullablezphot? Photometric redshift when the spectroscopy is not available (Salvato et al., 2009ApJ...690.1250S)src.redshiftfloatnullableClasssp? Classification derived from the spectra (1)meta.code.classfloatnullableClassph? Classification derived from the SED (Salvato et al., 2009ApJ...690.1250S) when the spectra are not available (2)meta.code.classfloatnullableE(B-V)AGN? Extinction E(B-V) of the AGN componentmagphot.color.excessfloatnullableUMAG? Rest-frame absolute U-band magnitude of the host galaxy not corrected for extinctionmagphys.magAbsfloatnullableBMAG? Rest-frame absolute B-band magnitude of the host galaxy not corrected for extinctionmagphys.magAbsfloatnullablel_logMLimti flag on logMmeta.code.errorcharlogM? Host galaxy stellar masslog(solMass)src.class.starGalaxyfloatnullablef_logM[0/2] Flag for logM (1)meta.codeintlogSFR? Host galaxy star-formation ratelog(solMass.yr**-1)phys.SFRdoublenullablef_logSFR[0/3] Flag for logSFR (1)meta.codeintE(B-V)Gal? Extinction E(B-V) of the galaxy componentmagphot.color.excessfloatnullableSimbadNameSimbad column added by the CDSmeta.idchar