J/A+A/491/379ivo://CDS.VizieR/J/A+A/491/379doi:10.26093/cds/vizier.34910379CDSGirardi M.Barrena R.Boschin W.Ellingson E.2009-04-03T13:16:51Z2009-04-03T13:10:39ZCDS support team

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

cds-question@unistra.frgalaxy-clustersgalaxiesphotometryradial-velocityThe connection of cluster mergers with the presence of extended, diffuse radio sources in galaxy clusters is still debated. An interesting case is the rich, merging cluster Abell 520, containing a radio halo. A recent gravitational analysis has shown in this cluster the presence of a massive dark core suggested to be a possible problem for the current cold dark matter paradigm. We aim to obtain new insights into the internal dynamics of Abell 520 analyzing velocities and positions of member galaxies. Our analysis is based on redshift data for 293 galaxies in the cluster field obtained combining new redshift data for 8 galaxies acquired at the TNG with data obtained by CNOC team and other few data from the literature. We also use new photometric data obtained at the INT telescope. We combine galaxy velocities and positions to select 167 cluster members around z~0.201. We analyze the cluster structure using the weighted gap analysis, the KMM method, the Dressler-Shectman statistics and the analysis of the velocity dispersion profiles. We compare our results with those from X-ray, radio and gravitational lensing analyses.2008A&A...491..379Ghttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/491/379CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/491/379https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/491/379http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/491/379https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/491/379https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/491/379http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/491/379GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/491/379/table1 (Velocity catalog of 293 spectroscopically measured galaxies in the field of A520)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/491/379/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/491/379/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/491/379/table1?GETtext/xml+votable180.050000true73.200253.0120.0055555555555555566/22966 229722.85864675833786e-19 3.5010283109654867e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/491/379?format=asciiOpticaldefaultJ/A+A/491/379/table1Velocity catalog of 293 spectroscopically measured galaxies in the field of A520r'mag? r' SDSS magnitudemagphot.mag;em.opt.RfloatnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint[GBB2008]Sequential numbermeta.recordintn_[GBB2008][*] * for non-cluster galaxiesmeta.notecharRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainczHeliocentric radial velocity (cz_{sun}_)km/sspect.dopplerVeloc;pos.heliocentricinte_czrms uncertainty on czkm/sstat.errorintr_cz[CPT+ ] Redshift source (1)meta.ref;pos.framechar