J/MNRAS/306/708ivo://CDS.VizieR/J/MNRAS/306/708doi:10.26093/cds/vizier.73060708CDSGeorgakakis A.Mobasher B.Cram L.Hopkins A.Lidman C.,Rowan-Robinson M.2024-06-26T20:16:02Z2005-05-24T21:37:50ZCDS support team

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

cds-question@unistra.frradio-galaxiesgalaxiesphotometryredshiftedline-intensitiesUsing a deep Australia Telescope Compact Array (ATCA) radio survey covering an area of ~3deg^2^ to a 4{sigma} sensitivity of >=100mmJy at 1.4GHz, we study the nature of faint radio galaxies. About 50 per cent of the detected radio sources are identified with an optical counterpart revealed by CCD photometry to m_R=22.5mag. Near-infrared (K-band) data are also available for a selected sample of the radio sources, while spectroscopic observations have been carried out for about 40 per cent of the optically identified sample. These provide redshifts and information on the stellar content. Emission-line ratios imply that most of the emission-line sources are star-forming galaxies, with a small contribution (~10 per cent) from Sy1/Sy2 type objects. We also find a significant number of absorption-line systems, likely to be ellipticals. These dominate at high flux densities (>1mJy) but are also found at sub-mJy levels. Using the Balmer decrement we find a visual extinction A_V_=1.0 for the star-forming faint radio sources. This moderate reddening is consistent with the V-R and R-K colours of the optically identified sources. For emission-line galaxies, there is a correlation between the radio power and the Halpha luminosity, in agreement with the result of Benn et al. (1993MNRAS.263....9B). This suggests that the radio emission of starburst radio galaxies is a good indicator of star formation activity.1999MNRAS.306..708Ghttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/306/708CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toVIII/57 : Fluxes of Faint Radio Sources at 2.7/4.75 GHz (Forkert+, 1987)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/306/708https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/306/708http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/306/708https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/306/708https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/306/708http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/306/708GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/306/708/table1 (Properties of the faint radio source catalogue)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/306/708/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/306/708/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/306/708/table1?GETtext/xml+votable180.050000true17.13788333-45.762294440.0055555555555555566/2826 35053 35055 35058 35064-35066 35397 35408https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/306/708?format=asciiOpticalRadiodefaultJ/MNRAS/306/708/table1Properties of the faint radio source cataloguezRedshiftfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint[GMC99b]Sequential number ([GMC99b] NNN in Simbad)intRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainVmag? V magnitudemagfloatnullableRcmag? Cousins R magnitudemagfloatnullableKmag? K magnitudemagfloatnullableS1.4GHzRadio flux density at 1.4GHzmJyfloatV-Rc? Cousins V-Rc colour indexmagfloatnullablee_V-Rc? rms uncertainty on V-RcmagfloatnullableRc-K? Cousins R-Kc colour indexmagfloatnullablee_Rc-K? rms uncertainty on R-Kcmagfloatnullableq_z[0/3] Redshift estimate quality parameter (1)intlogP1.4GHz? log_10_ of radio luminosity at 1.4GHzlog(W.Hz**-1)floatnullableRMAG? Absolute R magnitudemagfloatnullablelogLHa? log_10_ H{alpha} luminositylog(W)floatnullableEWHa? Rest-frame H{alpha} equivalent widthnmfloatnullablee_EWHa? rms uncertainty on EWHanmfloatnullableEW[OII]? Rest-frame [O II]3727 equivalent widthnmfloatnullablee_EW[OII]? rms uncertainty on EW[OII]nmfloatnullableClassSpectral classificationchar