J/MNRAS/438/796ivo://CDS.VizieR/J/MNRAS/438/796doi:10.26093/cds/vizier.74380796CDSSadler E.M.Ekers R.D.Mahony E.K.Mauch T.Murphy T.2024-08-08T20:12:33Z2017-08-28T14:02:44ZCDS support team

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

cds-question@unistra.frsurveysradio-galaxiesWe have made the first detailed study of the high-frequency radio-source population in the local Universe, using a sample of 202 radio sources from the Australia Telescope 20GHz (AT20G) survey identified with galaxies from the 6dF Galaxy Survey (6dFGS). The AT20G-6dFGS galaxies have a median redshift of z=0.058 and span a wide range in radio luminosity, allowing us to make the first measurement of the local radio luminosity function at 20GHz. Our sample includes some classical Fanaroff-Riley type I (FR I) and FR II radio galaxies, but most of the AT20G-6dFGS galaxies host compact (FR 0) radio active galactic nuclei which appear to lack extended radio emission even at lower frequencies. Most of these FR 0 sources show no evidence for relativistic beaming, and the FR 0 class appears to be a mixed population which includes young compact steep-spectrum and gigahertz peaked-spectrum radio galaxies. We see a strong dichotomy in the Wide-field Infrared Survey Explorer (WISE) mid-infrared colours of the host galaxies of FR I and FR II radio sources, with the FR I systems found almost exclusively in WISE 'early-type' galaxies and the FR II radio sources in WISE 'late-type' galaxies. The host galaxies of the flat- and steep-spectrum radio sources have a similar distribution in both K-band luminosity and WISE colours, though galaxies with flat-spectrum sources are more likely to show weak emission lines in their optical spectra. We conclude that these flat-spectrum and steep-spectrum radio sources mainly represent different stages in radio-galaxy evolution, rather than beamed and unbeamed radio-source populations.2014MNRAS.438..796Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/438/796CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toVII/250 : 2dF Galaxy Redshift Survey (2dFGRS) (2dFGRS Team, 1998-2003)VIII/78 : Sydney University Molonglo Sky Survey (SUMSS) (Mauch+ 2006)VIII/65 : 1.4GHz NRAO VLA Sky Survey (NVSS) (Condon+ 1998)J/MNRAS/329/227 : 2dF Galaxy Redshift Survey. II. (Sadler+, 2002)J/MNRAS/375/931 : Radio sources in the 6dFGS (Mauch+, 2007)J/MNRAS/402/2403 : Australia Tel. 20GHz Survey Catalog, AT20G (Murphy+, 2010)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/438/796https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/438/796http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/438/796https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/438/796https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/438/796http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/438/796GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/438/796/table3 (6dFGS galaxies detected as AT20G radio sources.)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/438/796/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/438/796/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/438/796/table3?GETtext/xml+votable180.050000true2.3419167-51.50330560.0055555555555555566/16480 16539 16599 16655 16696 16702 16888 16947 16962 17015 17080 17141 17574 17601 17662 17754 17798 17945 18017 18065-18066 18622 18769 20484 20494 20507 20527 20625 20654 20881 21006 21075 21133 21385 21409 21588 21905 22611 22789 24656 24709 24861 24870 24943 25055 25083 25490 25647 25707 25760 26903 26984 27196 27200 29707 31080 32818 32910 33164 33234 33304 33649 33670 33680 33953 33968 34104 34216 34443 34477 34545 34863 34886 34911 34950 34981 34986 35054 35097 35141 35330 35337 35434 35514 35608 35669 35843 36100-36101 36219 36263 36296 36452 36645 36659 36747 36754 36785 37441 38313 38347 38769 38817 38842 38937 39077 39079 39087 39137 39529 39590 39658 39722 39858 40231 40288 40332 40353 40431 40441 40777 40809 40856 41051-41052 41135 41230 41310 41329 42060 43233 43259 43262 43451 43595-43596 43600 43607 43626 43659 43672 43828 43915 43978 43980 44010 44068 44122 44247 44502 44554 44600 44650 44724 44729 44802 44812 45227 45293 45297 45446 45564 45571 45653 45704 45823 45875 45883 45904 45908 45921 46048 46124 46183 46442 46568 46615 46715 46773 46867 46984 47080 47107 47110 47187 47268 47386 47444 47573 47618 47636 47744 47747 47882 48064 48098 48614 48724 48907 48933 490025.585776613014535e-25 1.325213914061602e-23https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/438/796?format=asciiRadiodefaultJ/MNRAS/438/796/table36dFGS galaxies detected as AT20G radio sources.SimbadNameSimbad column added by the CDSmeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintn_Name[ab] Note on Sources (1)meta.notecharNameSource name from the AT20G catalogue (2)meta.id;meta.maincharRAJ2000Right ascension (J2000) (3)pos.eq.ra;meta.mainDEJ2000Declination (J2000) (3)pos.eq.dec;meta.mainS20The catalogued 20 GHz flux density (4)mJyphot.flux.density;em.radio.12-30GHzinte_S20? rms uncertainty on S20mJystat.errorintnullableS8.4? Catalogued 8.4 GHz flux density (5)mJyphot.flux.density;em.radio.6-12GHzintnullablee_S8.4? rms uncertainty on S8.4mJystat.errorintnullableS5? Catalogued 5 GHz flux density (5)mJyphot.flux.density;em.radio.3-6GHzintnullablee_S5? rms uncertainty on S5mJystat.errorintnullableS1.4? For sources north of declination -40{deg}, the total 1.4GHz flux density (6)mJyphot.flux.density;em.radio.750-1500MHzfloatnullableS843? For sources south of declination -30{deg}, the total 843MHz flux density (7)mJyphot.flux.density;em.radio.750-1500MHzdoublenullable6dFGS6dFGS name (gHHMMSSs+DDMMSS)meta.idcharl_OffsetLimit flag on Offsetmeta.code.errorcharOffset? Offset between the AT20G and 6dFGS positionarcsecpos.angDistancefloatnullableKmag2MASS total infrared K-band magnitude Ktot (8)magphot.mag;em.IR.KfloatzOptical redshift, as listed in the 6dFGS catalogue (Jones et al. 2009, Cat. VII/259)src.redshiftfloatq_z[234J-] 6dFGS redshift quality (9)meta.code.qual;src.redshiftcharClassSpectral classification for galaxies with a good-quality 6dFGS spectrum (10)spect.indexcharNotesNotesmeta.notechar