J/A+A/635/A98ivo://CDS.VizieR/J/A+A/635/A98doi:10.26093/cds/vizier.36350098CDSRescigno U.Grillo C.Lombardi M.Rosati P.Caminha G.B.Meneghetti M.,Mercurio A.Bergamini P.Coe D.2023-04-03T12:32:00Z2020-03-16T06:10:36ZCDS support team

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

cds-question@unistra.frgalaxy-clustersredshiftedAbell 2163 at z~=0.201 is one of the most massive galaxy clusters known, very likely in a post-merging phase. Data from several observational windows suggest a complex mass structure with interacting subsystems, which makes the reconstruction of a realistic merging scenario very difficult. A missing key element in this sense is unveiling the cluster mass distribution at high resolution. We perform such a reconstruction of the cluster inner total mass through a strong lensing model based on new spectroscopic redshift measurements. We use data from the Multi Unit Spectroscopic Explorer on the Very Large Telescope to confirm 12 multiple images of four sources with redshift values from 1.16 to 2.72. We also discover four new multiple images and identify 29 cluster members and 35 foreground and background sources. The resulting galaxy member and image catalogs are used to build five cluster total mass models. The fiducial model consists of 111 small-scale subhalos, plus a diffuse component, which is centered ~2" away from the BCG belonging to the east Abell 2163 subcluster. We confirm that the latter is well represented by a single, large-scale mass component. Its strong elongation towards a second (west) subcluster confirms the existence of a preferential axis, corresponding to the merging direction. From the fiducial model, we extrapolate the cumulative projected total mass profile and measure a value of M(<300kpc)=1.43_-0.06_^+0.07^x10^14^M_{sun}_, which has a significantly reduced statistical error compared with previous estimates, thanks to the inclusion of the spectroscopic redshifts. Our strong lensing results are very accurate: the model-predicted positions of the multiple images are, on average, only 0.15" away from the observed ones.2020A&A...635A..98Rhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/635/A98CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/619/A68 : A2163 VLA 20cm images (Thoelken+, 2018)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/635/A98https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/635/A98http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/635/A98https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/635/A98https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/635/A98http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/635/A98GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/635/A98/table1 (Redshift catalog of galaxy cluster members)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/635/A98/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/635/A98/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/635/A98/table1?GETtext/xml+votable180.050000true243.9449-6.138170.005555555555555556Cone search capability for table J/A+A/635/A98/table2 (Redshift catalog of multiple images)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/635/A98/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/635/A98/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/635/A98/table2?GETtext/xml+votable180.050000true243.95273-6.146460.005555555555555556Cone search capability for table J/A+A/635/A98/tablea1 (Redshift catalog of foreground/background sources)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/635/A98/tablea1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/635/A98/tablea1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/635/A98/tablea1?GETtext/xml+votable180.050000true243.94458-6.1350.0055555555555555566/30946https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/635/A98?format=asciidefaultJ/A+A/635/A98/table1Redshift catalog of galaxy cluster membersIDDesignation (1)meta.id;meta.mainintrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Right ascension (J2000)degpos.eq.ra;meta.mainDEJ2000Declination (J2000)degpos.eq.dec;meta.mainzMUSE redshiftsrc.redshiftfloatQFQuality Flag (G1)meta.code.qualintSimbadSimbad column added by the CDSmeta.ref.urlcharJ/A+A/635/A98/table2Redshift catalog of multiple imagesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDDesignationmeta.id;meta.maincharz? MUSE redshiftsrc.redshiftfloatnullableRAJ2000Right ascension (J2000)degpos.eq.ra;meta.mainDEJ2000Declination (J2000)degpos.eq.dec;meta.mainQFQuality Flag (G1)meta.code.qualintC18? Designation in Cerny et al., 2018ApJ...859..159C, table 13, will be [CSA2018] Abell 2163 N.N in Simbadmeta.idfloatnullableSimbadSimbad column added by the CDSmeta.ref.urlcharJ/A+A/635/A98/tablea1Redshift catalog of foreground/background sourcesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDDesignation (1)meta.id;meta.mainintRAJ2000Right ascension (J2000)degpos.eq.ra;meta.mainDEJ2000Declination (J2000)degpos.eq.dec;meta.mainzMUSE redshiftsrc.redshiftfloatQFQuality Flag (G1)meta.code.qualint