J/MNRAS/455/2731ivo://CDS.VizieR/J/MNRAS/455/2731doi:10.26093/cds/vizier.74552731CDSRees G.A.Spitler L.R.Norris R.P.Cowley M.J.Papovich C.,Glazebrook K.Quadri R.F.Straatman C.M.S.Allen R.Kacprzak G.G.,Labbe I.Nanayakkara T.Tomczak A.R.Tran K.-V.2024-08-15T20:16:50Z2016-10-17T11:05:30ZCDS support team

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

cds-question@unistra.frsurveysradio-galaxiesIn order to reproduce the high-mass end of the galaxy mass distribution, some process must be responsible for the suppression of star formation in the most massive of galaxies. Commonly active galactic nuclei (AGN) are invoked to fulfil this role, but the exact means by which they do so is still the topic of much debate, with studies finding evidence for both the suppression and enhancement of star formation in AGN hosts. Using the ZFOURGE (FourStar Galaxy Evolution) and NMBS (Newfirm Medium Band Survey) galaxy surveys, we investigate the host galaxy properties of a mass-limited (M>=10^10.5^M_{sun}_), high-luminosity (L_1.4_>10^24^W/Hz) sample of radio-loud AGN to a redshift of z=2.25. In contrast to low-redshift studies, which associate radio-AGN activity with quiescent hosts, we find that the majority of z>1.5 radio-AGN are hosted by star-forming galaxies. Indeed, the stellar populations of radio-AGN are found to evolve with redshift in a manner that is consistent with the non-AGN mass-similar galaxy population. Interestingly, we find that the radio-AGN fraction is constant across a redshift range of 0.25<=z<2.25, perhaps indicating that the radio-AGN duty cycle has little dependence on redshift or galaxy type. We do however see a strong relation between the radio-AGN fraction and stellar mass, with radio-AGN becoming rare below ~ 10^10.5^M_{sun}_ or a halo mass of 10^12^M_{sun}_. This halo-mass threshold is in good agreement with simulations that initiate radio-AGN feedback at this mass limit. Despite this, we find that radio-AGN host star formation rates are consistent with the non-AGN mass-similar galaxy sample, suggesting that while radio-AGN are in the right place to suppress star formation in massive galaxies they are not necessarily responsible for doing so.2016MNRAS.455.2731Rhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/455/2731CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/284 : COSMOS Multi-Wavelength Photometry Catalog (Capak+, 2007)II/253 : Chandra Deep Field South: multi-colour data (Wolf+, 2008)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/455/2731https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/455/2731http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/455/2731https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/455/2731https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/455/2731http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/455/2731GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/455/2731/tablea1 (VLA-ZFOURGE sample)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/455/2731/tablea1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/455/2731/tablea1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/455/2731/tablea1?GETtext/xml+votable180.050000true150.14721682.33718370.005555555555555556Cone search capability for table J/MNRAS/455/2731/tablea2 (VLA-NMBS sample)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/455/2731/tablea2?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/455/2731/tablea2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/455/2731/tablea2?GETtext/xml+votable180.050000true149.758164712.181259260.005555555555555556Cone search capability for table J/MNRAS/455/2731/tablea3 (All VLA sources in COSMOS that have a nearest neighbour with NMBS useflag = 1 but no Ks neighbour within 1 arcsecond.)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/455/2731/tablea3?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/455/2731/tablea3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/455/2731/tablea3?GETtext/xml+votable180.050000true149.73932922.45061940.005555555555555556Cone search capability for table J/MNRAS/455/2731/tablea4 (All VLA sources in COSMOS that have a nearest neighbour with ZFOURGE useflag = 1 but no Ks neighbour within 1 arcsecond)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/455/2731/tablea4?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/455/2731/tablea4?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/455/2731/tablea4?GETtext/xml+votable180.050000true150.04670832.200550.005555555555555556Cone search capability for table J/MNRAS/455/2731/tablea5 (All VLA sources in CDFS that have a nearest neighbour with ZFOURGE useflag = 1 but no Ks neighbour within 1 arcsecond)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/455/2731/tablea5?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/455/2731/tablea5?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/455/2731/tablea5?GETtext/xml+votable180.050000true53.0410833-27.83777780.0055555555555555566/27258 359359.276497240453405e-25 1.0188844282367877e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/455/2731?format=asciiRadiodefaultJ/MNRAS/455/2731/tablea1VLA-ZFOURGE samplerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameField and ID of the ZFOURGE/NMBS ks-band object (1)meta.idcharRAJ2000Right ascension (J2000) of the ZFOURGE/NMBS ks-band objectdegpos.eq.ra;meta.mainDEJ2000Declination (J2000) of the ZFOURGE/NMBS ks-band objectdegpos.eq.dec;meta.mainKsmagKs Band (ZFOURGE/NMBS) apparent magnitudemagphot.mag;em.IR.KfloatzphotPeak photometric redshift determined for the ZFOURGE/NMBS ks-band objectsrc.redshiftfloatzspec? Spectroscopic redshift listed for the ZFOURGE/NMBS ks-band object (-1 = no data)src.redshiftfloatnullablelogMassLog stellar mass of the ZFOURGE/NMBS ks-band objectlog(solMass)phys.massfloatF1.4GHz1.4GHz flux of the ZFOURGE/NMBS ks-band objectuJyphot.flux.density;em.radio.750-1500MHzdoubleL1.4GHz1.4GHz luminosity of the ZFOURGE/NMBS ks-band object, assumes a spectral index of 0.5W/Hzphys.luminosity;em.radio.750-1500MHzdoubleLIRBolometric IR luminosity of the ZFOURGE/NMBS ks-band object assuming a Wuyts 2011 average SED template to extrapolate from 24um fluxesW/Hzphys.luminosity;em.IRdoubleLUVEAZY interpolated rest-frame 2800{AA} luminosity of the ZFOURGE/NMBS ks-band objectW/Hzphys.luminosity;em.UVdoubleSFRRadioSFR from 1.4GHz luminosity of the radio objectsolMass/yrphys.SFRdoubleSFRUV+IRCombined SFR from LUV and LIR datasolMass/yrphys.SFRdoubleSFRratioRadio/UV+IR SFR Ratio (>=3.0 are Radio-AGN)phys.SFRfloatType[QU SF] Stellar Population type based on restframe UVJ color color classification (2)src.classcharSimbadSimbad column added by the CDSmeta.ref.urlcharJ/MNRAS/455/2731/tablea2VLA-NMBS samplerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameField and ID of the ZFOURGE/NMBS ks-band object (1)meta.idcharRAJ2000Right ascension (J2000) of the ZFOURGE/NMBS ks-band objectdegpos.eq.ra;meta.mainDEJ2000Declination (J2000) of the ZFOURGE/NMBS ks-band objectdegpos.eq.dec;meta.mainKsmagKs Band (ZFOURGE/NMBS) apparent magnitudemagphot.mag;em.IR.KfloatzphotPeak photometric redshift determined for the ZFOURGE/NMBS ks-band objectsrc.redshiftfloatzspec? Spectroscopic redshift listed for the ZFOURGE/NMBS ks-band object (-1 = no data)src.redshiftfloatnullablelogMassLog stellar mass of the ZFOURGE/NMBS ks-band objectlog(solMass)phys.massfloatF1.4GHz1.4GHz flux of the ZFOURGE/NMBS ks-band objectuJyphot.flux.density;em.radio.750-1500MHzdoubleL1.4GHz1.4GHz luminosity of the ZFOURGE/NMBS ks-band object, assumes a spectral index of 0.5W/Hzphys.luminosity;em.radio.750-1500MHzdoubleLIRBolometric IR luminosity of the ZFOURGE/NMBS ks-band object assuming a Wuyts 2011 average SED template to extrapolate from 24um fluxesW/Hzphys.luminosity;em.IRdoubleLUVEAZY interpolated rest-frame 2800{AA} luminosity of the ZFOURGE/NMBS ks-band objectW/Hzphys.luminosity;em.UVdoubleSFRRadioSFR from 1.4GHz luminosity of the radio objectsolMass/yrphys.SFRdoubleSFRUV+IRCombined SFR from LUV and LIR datasolMass/yrphys.SFRdoubleSFRratioRadio/UV+IR SFR Ratio (>=3.0 are Radio-AGN)phys.SFRfloatType[QU SF] Stellar Population type based on restframe UVJ color color classification (2)src.classcharSimbadSimbad column added by the CDSmeta.ref.urlcharJ/MNRAS/455/2731/tablea3All VLA sources in COSMOS that have a nearest neighbour with NMBS useflag = 1 but no Ks neighbour within 1 arcsecond.recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000VLA source right ascension (J2000)degpos.eq.ra;meta.mainDEJ2000VLA source declination (J2000)degpos.eq.dec;meta.mainFP1.4GHz1.4 GHz peak radio fluxuJyphot.flux.density;em.radio.750-1500MHzfloate_FP1.4GHzError on FP1.4GHzuJystat.errorfloatIP1.4GHzIntegrated 1.4 GHz peak fluxuJyphot.flux.density;em.radio.750-1500MHzfloate_IP1.4GHzError on IP1.4GHzuJystat.errorfloatRMSLocal rms at VLA source positionstat.stdevfloatKslimLimiting Ks magnitude at the source position with a zero-point of 25magphot.magfloatSepSeperation between VLA radio source and the nearest Ks-detected objectarcsecpos.angDistance;src.orbitalfloatKsmagNear? Ks magnitude of the nearest Ks-detected source with a zero-point of 25magphot.mag;em.IR.KfloatnullableNoteNotes (1)meta.notecharJ/MNRAS/455/2731/tablea4All VLA sources in COSMOS that have a nearest neighbour with ZFOURGE useflag = 1 but no Ks neighbour within 1 arcsecondNoteNotes (1)meta.notecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000VLA source right ascension (J2000)degpos.eq.ra;meta.mainDEJ2000VLA source declination (J2000)degpos.eq.dec;meta.mainFP1.4GHz1.4 GHz peak radio fluxuJyphot.flux.density;em.radio.750-1500MHzfloate_FP1.4GHzError on FP1.4GHzuJystat.errorfloatIP1.4GHzIntegrated 1.4 GHz peak fluxuJyphot.flux.density;em.radio.750-1500MHzfloate_IP1.4GHzError on IP1.4GHzuJystat.errorfloatRMSLocal rms at VLA source positionstat.stdevfloatKslimLimiting Ks magnitude at the source position with a zero-point of 25magphot.magfloatSepSeperation between VLA radio source and the nearest Ks-detected objectarcsecpos.angDistance;src.orbitalfloatKsmagNear? Ks magnitude of the nearest Ks-detected source with a zero-point of 25magphot.mag;em.IR.KfloatnullableJ/MNRAS/455/2731/tablea5All VLA sources in CDFS that have a nearest neighbour with ZFOURGE useflag = 1 but no Ks neighbour within 1 arcsecondrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000VLA source right ascension (J2000)degpos.eq.ra;meta.mainDEJ2000VLA source declination (J2000)degpos.eq.dec;meta.mainFP1.4GHz1.4 GHz peak radio fluxuJyphot.flux.density;em.radio.750-1500MHzfloate_FP1.4GHzError on FP1.4GHzuJystat.errorfloatIP1.4GHzIntegrated 1.4 GHz peak fluxuJyphot.flux.density;em.radio.750-1500MHzfloate_IP1.4GHzError on IP1.4GHzuJystat.errorfloatRMSLocal rms at VLA source positionstat.stdevfloatKslimLimiting Ks magnitude at the source position with a zero-point of 25magphot.magfloatSepSeperation between VLA radio source and the nearest Ks-detected objectarcsecpos.angDistance;src.orbitalfloatKsmagNear? Ks magnitude of the nearest Ks-detected source with a zero-point of 25magphot.mag;em.IR.KfloatnullableNoteNotes (1)meta.notechar