J/AJ/115/6ivo://CDS.VizieR/J/AJ/115/6doi:10.26093/cds/vizier.51150006CDSBarmby P.Huchra J.P.2023-04-06T16:50:28Z1998-06-03T07:47:40ZCDS support team

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

cds-question@unistra.frgalaxy-clustersradial-velocityccd-photometryThe Hercules supercluster consists of the Abell clusters A2147, A2151, and A2152. Previous studies of the kinematics have been confounded by the difficulty of correctly assigning galaxies to the individual clusters, which are not well separated. Our study has a total of 468 available velocities for galaxies in the region, 175 of them new. There are 414 galaxies in the supercluster, about 3 times the number used in the previous supercluster study. We verify the existence of the three individual clusters and compute their individual dynamical parameters. We investigate several techniques for assigning galaxy membership to clusters in this crowded field. We use the Kaye's mixture model (Ashman, Bird, & Zepf, 1994AJ....108.2348A) algorithm to separate the galaxies into clusters; we find that A2152 has a higher mean velocity than previous studies have reported. A2147 and A2152 also have lower velocity dispersions: 821^+68^_-55_ and 715^+81^_-61_km/s, respectively. The assignment of galaxies to either A2152 or A2147 requires velocity and position information. We study the kinematics of the supercluster using the two-body formalism of Beers, Geller, & Huchra (1982ApJ...257...23B) and conclude that A2147 and A2151 are probably bound to each other and that the supercluster as a whole may also be bound. The mass of the supercluster, if bound, is (7.6+/-2.0)x10^15^h^-1^M_{sun}_; with the supercluster luminosity, (1.4+/-0.2)x10^13^h^-2^L_{sun}_, this yields {OMEGA}=0.34+/-0.1.1998AJ....115....6Bhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/115/6CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toVII/99 : Radial Velocities of Galaxies (Palumbo+ 1986)VII/112 : RC2 Catalogue (de Vaucouleurs+ 1976)VII/155 : RC3 Catalogue (de Vaucouleurs+ 1991)VII/172 : First Byurakan Survey (FBS) (Markarian+, 1989)J/A+AS/109/537 : Redshift survey of faint galaxies (Hopp+, 1995)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/115/6https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/115/6http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/115/6https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/115/6https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/115/6http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/115/6GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/115/6/table1 (*Galaxies in the Hercules supercluster)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/115/6/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/115/6/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/115/6/table1?GETtext/xml+votable180.050000true238.929458318.28258060.005555555555555556Cone search capability for table J/AJ/115/6/table9 (CCD photometry for A2151 galaxies)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/115/6/table9?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/115/6/table9?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/115/6/table9?GETtext/xml+votable180.050000true241.2708317.795560.0055555555555555565/2128 2130-2131 2136-2137 6/8469-8471 8476-8477 8479 8516 8518-8519 8536-8538 8560 31722-31723https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/115/6?format=asciiOpticaldefaultJ/AJ/115/6/table1*Galaxies in the Hercules superclusterMTypeMorphological typesrc.morph.typecharNameGalaxy namemeta.id;meta.maincharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Right ascension (J2000.0)pos.eq.ra;meta.mainDEJ2000Declination signpos.eq.dec;meta.mainRmagR magnitudemagphot.mag;em.opt.RfloatHVHeliocentric velocitykm/sphys.veloc;pos.heliocentricinte_HVrms uncertainty on HVkm/sstat.errorintr_HV[1/32] Velocity source, see refs.datmeta.refintJ/AJ/115/6/refsReferences quoted in Table 1recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRefCode[1/32]+= Reference codemeta.refintTextText of reference (including the 19-digit bibcode)meta.bib.bibcodecharJ/AJ/115/6/table9CCD photometry for A2151 galaxiesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameGalaxy namemeta.id;meta.maincharRAJ2000Right ascension (J2000.0)pos.eq.ra;meta.mainDEJ2000Declination signpos.eq.dec;meta.mainBmagB magnitudemagphot.mag;em.opt.BfloatB-RB-R colour indexmagphot.color;em.opt.B;em.opt.Rfloat