J/ApJ/539/136ivo://CDS.VizieR/J/ApJ/539/136doi:10.26093/cds/vizier.15390136CDSZabludoff A.I.Mulchaey J.S.2000-10-31T12:11:02Z2000-10-31T12:59:16ZCDS support team

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

cds-question@unistra.frgalaxy-clustersradial-velocityapparent-magnitudeThe form of the galaxy luminosity function (GLF) in poor groups - regions of intermediate galaxy density that are common environments for galaxies - is not well understood. Multiobject spectroscopy and wide-field CCD imaging now allow us to measure the GLF of bound group members directly (i.e., without statistical background subtraction) and to compare the group GLF with the GLFs of the field and of rich clusters. We use R-band images in 1.5x1.5degree^2^ mosaics to obtain photometry for galaxies in the fields of six nearby (2800<cz<7700km/s) poor groups for which we have extensive spectroscopic data, including 328 new galaxy velocities.2000ApJ...539..136Zhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/539/136CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/ApJ/496/39 : Properties of poor groups of galaxies. I. (Zabludoff+ 1998)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/539/136https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/539/136http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/539/136https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/539/136https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/539/136http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/539/136GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/539/136/table1 (Galaxy data)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/539/136/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/539/136/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/539/136/table1?GETtext/xml+votable180.050000true124.35583321.1636110.005555555555555556Cone search capability for table J/ApJ/539/136/table2 (Group properties)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/539/136/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/539/136/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/539/136/table2?GETtext/xml+votable180.050000true125.097521.1497220.0055555555555555565/6940 10073 6/4715 4718 4719 4801 4804 4806 25763 25768 25769 25771 25772 25774 26574 26593 26596 26597 26598 27738 27739 27749 38345 38346 38347 38348 38350 38368 38369 38372 40289 40291 40300https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/539/136?format=asciiOpticaldefaultJ/ApJ/539/136/table1Galaxy datarecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGroupDisplay the parameters of the Groupmeta.refcharNameGalaxy namemeta.id;meta.maincharRAJ2000Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainHRVHeliocentric radial velocity from NEDkm/sphys.veloc;pos.heliocentricinte_HRVUncertainty in HRVkm/sstat.errorintf_HRVFlag on the type of velocity measurement (1)meta.code.errorintRmag? Magnitude in the R bandmagphot.mag;em.opt.RfloatnullableJ/ApJ/539/136/table2Group propertiesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMembersDisplay the members in this Groupmeta.refcharGroupGroup name (4)meta.idcharRAJ2000Right ascension of the group optical projected centroid in J2000pos.eq.ra;meta.mainDEJ2000Declination of the group optical projected centroid in J2000pos.eq.dec;meta.mainNgroupNumber of group members (1)meta.numberint<HRV>Mean heliocentric velocity (1)km/sphys.veloc;stat.meaninte_<HRV>rms uncertainty on <HRV>km/sstat.errorintsigmaLine-of-sight velocity dispersionkm/sphys.veloc.dispersionintE_sigmaError on sigma (upper limit)km/sstat.errorinte_sigmaError on sigma (lower limit)km/sstat.errorintlogLxX-ray luminosity (2)log(1e-07W)phys.luminosity;em.X-rayfloatrsampleSampling radius for the photometryMpcphys.size.radiusfloatN'grpNumber of members within rsample (4) (3)meta.numberintn0,4Corrected number density of galaxies (5)Mpc**-3phys.densityfloatD/G0.4Dwarf-to-giant ratio (6)statfloate_D/G0.4rms uncertainty on D/G0.4stat.errorfloat