J/AJ/106/1273ivo://CDS.VizieR/J/AJ/106/1273doi:10.26093/cds/vizier.51061273CDSZabludoff A.I.Geller M.J.Huchra J.P.Vogeley M.S.2023-04-06T16:50:03Z2002-01-01T08:52:27ZCDS support team

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

cds-question@unistra.frgalaxy-clustersradial-velocitygalaxy-kinematicsWe have measured redshifts in the fields of the 31 R>=1 Abell clusters with 0.02<z<0.05 and |bII|>30{deg}, from medium resolution spectra (5 or 7{AA}). At least ten of the fields are severely contaminated by superimposed velocity peaks. We derive the mean velocities and velocity dispersions of the 25 dense peaks in the sample. The abundance of peaks, 6.6x10^-6^h^3^ Mpc^-3^, is consistent with the mean number density of R>1 Abell clusters (Bahcall & Soneira 1983ApJ...270...20B). The range of velocity dispersions is 304-1346 km/s. The median dispersion is 718 km/s. The subset of eight systems with cD galaxies has a median velocity dispersion of 792 km/s, close to that of non-cD systems (626 km/s). When these data are combined with 16 cD cluster velocity dispersions from our previous study (Zabludoff et al. 1990ApJS...74....1Z, and Dunn [Proceedings of NATO Conf. 1991]), eight of 25 cD galaxies have peculiar motions larger than half the cluster velocity dispersions. These findings further support the conclusions of Beers & Geller (1983ApJ...274..491B), and Dunn (1991), who argue that cD galaxies do not lie in the global kinematic center, but in local potential minima. If so, systems with speeding cD's are probably a guide to substructure in dynamically evolving systems.1993AJ....106.1273Zhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/106/1273CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/106/1273https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/106/1273http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/106/1273https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/106/1273https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/106/1273http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/106/1273GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/106/1273/table1 (Cluster data)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/106/1273/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/106/1273/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/106/1273/table1?GETtext/xml+votable180.050000true14.013996-1.3128330.005555555555555556Cone search capability for table J/AJ/106/1273/table2 (Peak velocity dispersions)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/106/1273/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/106/1273/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/106/1273/table2?GETtext/xml+votable180.050000true14.089-1.26290.0055555555555555565/2067 6934 7103 6/50 5201 5204 5383 5389 5394 5400 5978-5979 6000-6001 8223 8266-8267 8282 8288-8289 8440 8442 8515 8520 8526 8648-8650 9467-9468 9470-9471 9812-9813 10378-10379 10400-10401 17621 17623 17629 17794 17800 17808 17810-17811 18008-18009 18011 18016-18017 18184-18185 18238 18324 19319 19325 19602-19603 19608-19609 19783 19789 20002 20008 22577 22686-22687 22708-22709 24943 25669 25680 25682 27218 27224-27225 27719 27725 27727 27730 28127 28149 28249-28251 28254 28586https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/106/1273?format=asciiOpticaldefaultJ/AJ/106/1273/table1Cluster datarecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintClusterAbell cluster designationmeta.id.parentcharGalaxyGalaxy name (1)meta.id;meta.maincharRA1950Right Ascension 1950pos.eq.ra;meta.mainDE1950Declination 1950pos.eq.dec;meta.mainB(0)[]? Integrated magnitudemagphot.mag;em.opt.Bfloatnullablen_B(0)[RMCPHK] Origin of B(0) (2)meta.notecharRVVelocitykm/sphys.veloc;pos.heliocentricinte_RVMean error on Vkm/sstat.errorint_RA.icrsRight ascension (ICRS) (computed by VizieR, not part of the original data)pos.eq.ranullableindexed_DE.icrsDeclination (ICRS) (computed by VizieR, not part of the original data)pos.eq.decnullableindexedJ/AJ/106/1273/table2Peak velocity dispersionsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintClusterAbell cluster designationmeta.id.parentcharPeakPeak name (1)meta.id;meta.maincharn_PeakNote (2)meta.notecharRA1950Right ascension (1950.0)pos.eq.ra;meta.mainDE1950Declination (1950.0)pos.eq.dec;meta.mainNtotTotal number of redshifts in the fieldmeta.numberintVlowVelocity limit which enclose member galaxies1000km.s**-1phys.veloc;pos.heliocentricfloatVupVelocity limit which enclose member galaxies1000km.s**-1phys.veloc;pos.heliocentricfloatNcNumber of member galaxiesmeta.numberint<v>Mean velocitykm/sphys.veloc;stat.meaninte_<v>rms uncertainty on mean velocitykm/sstat.errorintsigmaLine-of-sight velocity dispersionkm/sphys.veloc.dispersionintE_sigmaError on sigma (upper limit)km/sstat.error;stat.maxinte_sigmaError on sigma (lower limit)km/sstat.errorint_RA.icrsRight ascension (ICRS) (computed by VizieR, not part of the original data)pos.eq.ranullableindexed_DE.icrsDeclination (ICRS) (computed by VizieR, not part of the original data)pos.eq.decnullableindexed