J/AJ/135/1311ivo://CDS.VizieR/J/AJ/135/1311doi:10.26093/cds/vizier.51351311CDSAuger M.W.Becker R.H.Fassnacht C.D.2010-10-01T14:17:00Z2010-09-13T15:07:31ZCDS support team

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

cds-question@unistra.frradio-galaxiesredshiftedspectroscopyvisible-astronomysloan-photometryIn the local universe, high-power radio galaxies live in lower-density environments than low-luminosity radio galaxies. If this trend continued to higher redshifts, powerful radio galaxies would serve as efficient probes of moderate redshift groups and poor clusters. Photometric studies of radio galaxies at 0.3<~z<~0.5 suggest that the radio luminosity-environment correlation disappears at moderate redshifts, though this could be the result of foreground/background contamination affecting the photometric measures of environment. We have obtained multi-object spectroscopy in the fields of 14 lower luminosity (L_1.4GHz_<4x10^24^W/Hz) and higher luminosity (L_1.4GHz_>1.2x10^25^W/Hz) radio galaxies at z~0.3 to spectroscopically investigate the link between the environment and the radio luminosity of radio galaxies at moderate redshifts. Our results support the photometric analyses; there does not appear to be a correlation between the luminosity of a radio galaxy and its environment at moderate redshifts. Hence, radio galaxies are not efficient signposts for group environments at moderate redshifts.2008AJ....135.1311Ahttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/135/1311CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toVIII/71 : The FIRST Survey Catalog, Version 03Apr11 (Becker+ 2003)VII/250 : The 2dF Galaxy Redshift Survey (2dFGRS) (2dFGRS Team, 1998-2003)II/294 : The SDSS Photometric Catalog, Release 7 (Adelman-McCarthy+, 2009)J/AJ/123/3018 : Redshifts of radio-selected poor clusters (Miller+, 2002)J/MNRAS/333/100 : Radio galaxies in the 2dFGRS (Magliocchetti+, 2002)J/A+A/424/371 : 1.4GHz First Look Survey (FLS) (Morganti+, 2004)J/MNRAS/390/819 : Combined NVSS-FIRST Galaxies (CoNFIG) sample (Gendre+, 2008)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/135/1311https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/135/1311http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/135/1311https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/135/1311https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/135/1311http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/135/1311GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/135/1311/table3 (*Radio galaxy group properties)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/135/1311/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/135/1311/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/135/1311/table3?GETtext/xml+votable180.050000true194.08983331.42955560.005555555555555556Cone search capability for table J/AJ/135/1311/table12 (*Moderate redshift radio galaxy sub-sample with LRIS MOS observations (14 targets) (table1 and 2 of the paper))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/135/1311/table12?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/135/1311/table12?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/135/1311/table12?GETtext/xml+votable180.050000true194.0921251.42641670.005555555555555556Cone search capability for table J/AJ/135/1311/table4 (*Group Member Properties)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/135/1311/table4?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/135/1311/table4?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/135/1311/table4?GETtext/xml+votable180.050000true194.128351.418010.0055555555555555566/8369 8371 8372 8374 8710 9759 17304 17856 18011 18177 18536 18790 19202 26223 32399 32481 489892.040811542443644e-19 4.653515163505597e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/135/1311?format=asciiOpticalRadiodefaultJ/AJ/135/1311/table3*Radio galaxy group propertiesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameName of the sub-sample radio galaxy (HHMMSS.sss+DDMMSS.ss) associated with the group \linkRole{galaxies in the group }meta.numbercharprimaryRAJ2000Group Hour of right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Group Degree of declination (J2000)pos.eq.dec;meta.mainNspNumber of spectroscopically confirmed group membersmeta.numberintN500Number of photometrically estimated group members within 500h^-1^kpcmeta.numberintN1000Number of photometrically estimated group members within 1h^-1^Mpcmeta.numberintoffOffset of the sub-sample radio galaxy from the spectroscopic group centerarcsecpos.angDistanceintzRedshift of the groupsrc.redshiftfloatsigmaVelocity dispersion of the groupkm/sphys.veloc.dispersion;pos.lginte_sigmaVelocity dispersion of the group uncertaintykm/sstat.errorinttargetLRIS MOS observationsmeta.ref.urlcharJ/AJ/135/1311/table12*Moderate redshift radio galaxy sub-sample with LRIS MOS observations (14 targets) (table1 and 2 of the paper)texpExposure timestime.duration;obs.exposureintNameName of the radio galaxy (HHMMSS.sss+DDMMSS.ss)meta.id;meta.maincharRAJ2000Hour of right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of declination (J2000)pos.eq.dec;meta.mainzRedshift of the galaxysrc.redshiftfloatL1.4GHzLuminosity at 1.4GHz1e+24W.Hz**-1phys.luminosity;em.radio.750-1500MHzfloatObsdateObservation datetime.epoch;obsnullableNzNumber of successful redshifts obtained per mask (see section 3)meta.numberintFIRSTDisplay details from FIRST for this sourcemeta.ref.urlcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintJ/AJ/135/1311/table4*Group Member Propertiesl_zmagLimit flag on zmagmeta.code.errorcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameSub-sample radio galaxy name (HHMMSS.sss+DDMMSS.ss) \linkRole{group of the galaxy }meta.id;meta.maincharRAJ2000Member Hour of Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000Member Degree of Declination (J2000)pos.eq.dec;meta.mainzRedshiftsrc.redshiftfloatl_gmagLimit flag on gmagmeta.code.errorchargmagMember SDSS g band magnitudemagphot.mag;em.opt.Bfloatl_rmagLimit flag on rmagmeta.code.errorcharrmagMember SDSS r band magnitudemagphot.mag;em.opt.Rfloatl_imagLimit flag on imagmeta.code.errorcharimagMember SDSS i band magnitudemagphot.mag;em.opt.IfloatzmagMember SDSS z band magnitudemagphot.mag;em.opt.IfloatSDSSDisplay the SDSS data for this radiogalaxymeta.ref.urlcharDR7Display the details of the photometry from SDSS-DR7meta.ref.urlchar