J/MNRAS/436/3759ivo://CDS.VizieR/J/MNRAS/436/3759doi:10.26093/cds/vizier.74363759CDSBonzini M.Padovani P.Mainieri V.Kellermann K.I.Miller N.,Rosati P.Tozzi P.Vattakunnel S.2024-08-07T20:12:05Z2015-10-05T15:48:30ZCDS support team

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

cds-question@unistra.fractive-galactic-nucleiinfrared-sourcesx-ray-sourcesradio-sourcesThe sub-mJy radio population is a mixture of active systems, that is star-forming galaxies (SFGs) and active galactic nuclei (AGNs). We study a sample of 883 radio sources detected at 1.4GHz in a deep Very Large Array survey of the Extended Chandra Deep Field-South that reaches a best rms sensitivity of 6{mu}Jy. We have used a simple scheme to disentangle SFGs, radio-quiet (RQ), and radio-loud (RL) AGNs based on the combination of radio data with Chandra X-ray data and mid-infrared observations from Spitzer. We find that at flux densities between about 30 and 100{mu}Jy, the radio population is dominated by SFGs (~60%) and that RQ AGNs become increasingly important over RL ones below 100 {mu}Jy. We also compare the host galaxy properties of the three classes in terms of morphology, optical colours and stellar masses. Our results show that both SFG and RQ AGN host galaxies have blue colours and late-type morphology while RL AGNs tend to be hosted by massive red galaxies with early-type morphology. This supports the hypothesis that radio emission in SFGs and RQ AGNs mainly comes from the same physical process: star formation in the host galaxy.2013MNRAS.436.3759Bhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/436/3759CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/ApJS/161/21 : Extended Chandra Deep Field-South survey (Lehmer+, 2005)J/ApJS/195/10 : The CDF-S survey: 4Ms source catalogs (Xue+, 2011)J/ApJ/727/1 : IRAC/MUSYC SIMPLE survey (Damen+, 2011)J/ApJS/203/15 : Counterparts to 1.4GHz sources in ECDF-S (Bonzini+, 2012)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/436/3759https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/436/3759http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/436/3759https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/436/3759https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/436/3759http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/436/3759GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/436/3759/table1 (Classification of radio sources)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/436/3759/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/436/3759/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/436/3759/table1?GETtext/xml+votable180.050000true6/35934-35935 35957https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/436/3759?format=asciiX-rayInfraredRadiodefaultJ/MNRAS/436/3759/table1Classification of radio sourcesRIDRadio source ID, [MBF2013] NNN in Simbad (1)meta.id;spect.dopplerVeloc.radio;em.radiointrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000? Optical-IR counterpart right ascension (J2000)pos.eq.ra;meta.mainnullableDEJ2000? Optical-IR counterpart declination (J2000)pos.eq.dec;meta.mainnullableClassClassification of the source (2)meta.code.classcharz? Redshiftsrc.redshiftfloatnullablelogPr? Radio powerlog(W.Hz**-1)phys.luminosity;em.radiofloatnullablel_logLXLimit flag for 3{sigma} upper limitmeta.code.errorcharlogLX? X-ray luminosity in the hard band (2-10keV) (3)log(1e-07W)phys.luminosity;em.X-rayfloatnullablelogq24o? Ratio of the observed 24um and 1.4GHz luminositiesphot.flux.density;em.radio.750-1500MHzfloatnullablelog(S3/S1)? log10 of the ratio of the flux density in the 5.8 and 3.6um IRAC bandsphot.flux;arith.ratiofloatnullablelog(S4/S2)? log10 of the ratio of the flux density in the 8.0 and 4.5um IRAC bandsphot.flux;arith.ratiofloatnullablealphar? Radio spectral index; alphar=0.7 if no 6cm observations are availablespect.indexfloatnullableBMAG? Rest frame absolute B magnitudemagphys.magAbs;em.opt.B;obs.fieldfloatnullableQF[1/3] Quality flag of the classification: from 3=secure to 1=insecuresrc.classintf_logq24o[0/1] Flag for the logq24o: 1 = upper limit on logq24o, 0 = detectionmeta.codeintSimbadSimbad column added by the CDSmeta.ref.urlchar