J/A+A/377/428ivo://CDS.VizieR/J/A+A/377/428doi:10.26093/cds/vizier.33770428CDSSodre L.Jr.Proust D.Capelato H.V.Lima Neto G.B.Cuevas H.,Quintana H.Fouque P.2017-10-27T14:37:56Z2001-10-08T19:51:54ZCDS support team

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

cds-question@unistra.frgalaxy-clustersx-ray-sourcesradial-velocityWe present a dynamical analysis of the galaxy cluster Abell 970 based on a new set of radial velocities measured at ESO, Pic du Midi and Haute-Provence observatories. Our analysis indicates that this cluster has a substructure and is out of dynamical equilibrium. This conclusion is also supported by differences in the positions of the peaks of the surface density distribution and X-ray emission, as well as by the evidence of a large-scale velocity gradient in the cluster. We also found a discrepancy between the masses inferred with the virial theorem and those inferred with the X-ray emission, which is expected if the galaxies and the gas inside the cluster are not in hydrostatic equilibrium. Abell 970 has a modest cooling flow, as is expected if it is out of equilibrium. We propose that cooling flows may have an intermittent behaviour, with phases of massive cooling flows being followed by phases without significant cooling flows after the accretion of a galaxy group massive enough to disrupt the dynamical equilibrium in the centre of the clusters. A massive cooling flow will be established again, after a new equilibrium is achieved.2001A&A...377..428Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/377/428CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/377/428https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/377/428http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/377/428https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/377/428https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/377/428http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/377/428GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/377/428/table1 (Heliocentric radial velocities for galaxies)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/377/428/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/377/428/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/377/428/table1?GETtext/xml+votable180.050000true154.357083-10.6891670.0055555555555555566/26770-26771https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/377/428?format=asciiX-rayOpticaldefaultJ/A+A/377/428/table1Heliocentric radial velocities for galaxiesGalGalaxy numbermeta.id;meta.mainintrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainMTypeMorphological typesrc.morph.typecharbmagb_j_ magnitude from the COSMOS/UKST Southern Sky Object Cataloguemagphot.mag;em.opt.Bfloatn_bmag[*] *: estimated magnitudemeta.notecharHRVHeliocentric radial velocitykm/sspect.dopplerVeloc;pos.heliocentricinte_HRVrms uncertainty on HRVkm/sstat.errorintRSignal-to-noise measure derived from Tonry & Davis (1979AJ.....84.1511T)stat.correlationfloatTel[oep] Telescope (1)meta.id;instr.telcharNoteNote (2)meta.notechar