J/MNRAS/341/993ivo://CDS.VizieR/J/MNRAS/341/993doi:10.26093/cds/vizier.73410993CDSCirasuolo M.Magliocchetti M.Celotti A.Danese L.2024-06-28T20:17:18Z2008-11-07T07:53:15ZCDS support team

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

cds-question@unistra.frquasarsradio-sourcesphotometryredshiftedWe present a detailed analysis of a sample of radio-detected quasars, obtained by matching together objects from the FIRST (<VIII/71>) survey and the 2dF Quasar Redshift Survey (2dF, <VII/223>). The data set consists of 113 sources, spanning a redshift range 0.35<~z<~2.2, with optical magnitudes 18.25<=bj<=20.85 and radio fluxes S_1.4GHz_>=1mJy. These objects exhibit properties such as redshift and colour distribution in full agreement with those derived for the whole quasar population, suggesting that the mechanism(s) controlling the birth and lifetime of quasars are independent of their level of radio emission. The long-debated question of the radio-loud/radio quiet (RL/RQ) dichotomy is then investigated for the combined FIRST-2dF and FIRST-LBQS (Large Bright Quasar Survey) samples, as they present similar selection criteria.2003MNRAS.341..993Chttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/341/993CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/MNRAS/357/1267 : bJur photometry and redshifts of QSOs (Cirasuolo+, 2005)VII/223 : The 2dF QSO Redshift Survey. V. The 10k cat. (Croom+ 2001)VIII/71 : The FIRST Survey Catalog, Version 03Apr11 (Becker+ 2003)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/341/993https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/341/993http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/341/993https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/341/993https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/341/993http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/341/993GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/341/993/table1 (Optical and radio properties of the FIRST-2dF quasar sample)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/341/993/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/341/993/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/341/993/table1?GETtext/xml+votable180.050000true148.1891670.0038890.0055555555555555566/25589 25595 25845 25847 25855 25909-25911 25924-25925 25931-25932 25934 25938 25952 25991 25995 25998-25999 26001 26003-26004 26007 26009 26012 26014 26016 26018 26026 26048 26169 26197 26199 26202 26205 26210-26212 26217 26222 26243 26246-26247 26249-26250 26252 26254-26255 26260 26262 26273-26274 26276 26280-26281 26283 26368 26847 26870-26871 26935 26943 26951 26954-26956 26958 26967 26971 26976-26977 26980 26982-26983 27015 27021 27023-27024 27030 27032 27034 27167 27189 27214 27225-27227 27231 27238 27241 27244 27246 27249-27250 27400https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/341/993?format=asciiOpticalRadiodefaultJ/MNRAS/341/993/table1Optical and radio properties of the FIRST-2dF quasar samplezRedshiftsrc.redshiftfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint2QZ2dF name, based on J2000 coordinatesmeta.id;meta.maincharRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainOffsetRadio-to-optical offsetarcsecpos.angDistancefloatbjmagb_j_ magnitudemagphot.mag;em.opt.Bfloatu-bju-b_j_ colour indexmagphot.color;em.opt.U;em.opt.Bfloatbj-rb_j_-r colour indexmagphot.color;em.opt.B;em.opt.RfloatS1.4GHzFlux density at 1.4GHzmJyphot.flux.density;em.radio.750-1500MHzfloatMorph[dst ?] Morphological appearance (1)src.morphcharSp-Index? Radio spectral indexspect.index;em.radiofloatnullableSimbadSimbad column added by the CDSchar