J/ApJ/613/841ivo://CDS.VizieR/J/ApJ/613/841doi:10.26093/cds/vizier.16130841CDSMiller N.A.Owen F.N.Hill J.M.Keel W.C.Ledlow M.J.Oegerle W.R.2005-06-12T22:05:51Z2005-06-12T22:05:43ZCDS support team

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

cds-question@unistra.frgalaxy-clustersredshiftedWe present 371 galaxy velocities in the field of the very rich cluster A2125 (z~0.25). These were determined using optical spectroscopy collected over several years from both the WIYN 3.5m telescope and NOAO Mayall 4m telescope. Prior studies at a variety of wavelengths (radio, optical, and X-ray) have indicated that A2125 is a likely cluster-cluster merger, a scenario that we are able to test using our large velocity database. We identified 224 cluster galaxies, which were subjected to a broad range of statistical tests using both positional and velocity information to evaluate the cluster dynamics and substructure. The tests confirmed the presence of substructures within the A2125 system at high significance, demonstrating that A2125 is a complex dynamical system. Comparison of the test results with existing simulations strengthens the merger hypothesis and provides clues about the merger geometry and stage. The merger model for the system can reconcile A2125's low X-ray temperature and luminosity with its apparently high richness and might also explain A2125's high fraction of active galaxies identified in prior radio and optical studies.2004ApJ...613..841Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/613/841CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/AJ/118/625 : Radio sources in Abell 2125 and 2645 (Dwarakanath+, 1999)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/613/841https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/613/841http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/613/841https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/613/841https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/613/841http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/613/841GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/613/841/table2 (Cluster velocity data)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/613/841/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/613/841/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/613/841/table2?GETtext/xml+votable180.050000true234.55791766.2183330.005555555555555556Cone search capability for table J/ApJ/613/841/table3 (Noncluster redshifts)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/613/841/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/613/841/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/613/841/table3?GETtext/xml+votable180.050000true234.4837566.460.0055555555555555566/11663 11685https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/613/841?format=asciiOpticaldefaultJ/ApJ/613/841/table2Cluster velocity datarecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Hour of Right Ascension (J2000)pos.eq.ra;meta.mainf_RAs[a] Flag on RAs (1)charDEJ2000Degree of Declination (J2000)pos.eq.dec;meta.mainczHeliocentric velocity (2)km/sinte_czError in czkm/sintLinesEmission lines used in determining cz (3)charRefSource reference (4)charf_Ref[b] Flag on Ref (5)charJ/ApJ/613/841/table3Noncluster redshiftsf_z[a] Flag on z (1)chare_z? Error in zfloatnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Hour of Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of Declination (J2000)pos.eq.dec;meta.mainz? Heliocentric redshiftfloatnullableLinesEmission lines used in determining z (2)charf_Lines[b] Flag on Lines (3)charRefSource reference (4)char