J/MNRAS/469/3946ivo://CDS.VizieR/J/MNRAS/469/3946doi:10.26093/cds/vizier.74693946CDSLagattuta D.J.Richard J.Clement B.Mahler G.Patricio V.Pello R.,Soucail G.Schmidt K.B.Wisotzki L.Martinez J.Bina D.2024-08-17T20:19:29Z2020-06-02T11:31:24ZCDS support team

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

cds-question@unistra.frgalaxy-clustersgravitational-lensingredshiftedhst-photometryWe present a strong lensing analysis on the massive cluster Abell 370 (A370; z=0.375), using a combination of deep multiband Hubble Space Telescope (HST) imaging and Multi-Unit Spectroscopic Explorer (MUSE) spectroscopy. From only 2 h of the MUSE data, we are able to measure 120 redshifts in the southern BCG area, including several multiply imaged lens systems. In total, we increase the number of multiply imaged systems with a secure redshift from 4 to 15, nine of which are newly discovered. Of these, eight are located at z>3, greatly extending the redshift range of spectroscopically confirmed systems over previous work. Using these systems as constraints, we update a parametric lens model of A370, probing the mass distribution from cluster to galaxy scales. Overall, we find that a model with only two cluster-scale dark matter haloes (one for each BCG) does a poor job of fitting these new image constraints. Instead, two additional mass clumps - a central 'bar' of mass located between the BCGs, and another clump located within a 'crown' of galaxies in the northern part of the cluster field - provide significant improvements to the fit. Additional physical evidence suggests these clumps are indeed real features of the system, but with relatively few image constraints in the crown region, this claim is difficult to evaluate from a modelling perspective. Additional MUSE observations of A370 covering the entire strong-lensing region will greatly help these efforts, further improving our understanding of this intriguing cluster.2017MNRAS.469.3946Lhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/469/3946CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/407/791 : ACO 370, 2218 and 2390 fluxes at 7 and 15um (Metcalfe+, 2003)J/ApJS/202/2 : VLA 1.4GHz observations of A370 and A2390 (Wold+, 2012)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/469/3946https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/469/3946http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/469/3946https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/469/3946https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/469/3946http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/469/3946GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/469/3946/table1 (Multiply imaged systems)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/469/3946/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/469/3946/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/469/3946/table1?GETtext/xml+votable180.050000true39.96704694-1.57691720.005555555555555556Cone search capability for table J/MNRAS/469/3946/table2 (Cluster members)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/469/3946/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/469/3946/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/469/3946/table2?GETtext/xml+votable180.050000true39.97519806-1.58792820.005555555555555556Cone search capability for table J/MNRAS/469/3946/table3 (Other foreground and background objects)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/469/3946/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/469/3946/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/469/3946/table3?GETtext/xml+votable180.050000true39.97207694-1.58053080.0055555555555555566/177412.0401237512456292e-19 3.9057996558789745e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/469/3946?format=asciidefaultJ/MNRAS/469/3946/table1Multiply imaged systemsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintn_ID[*] Note on ID (1)meta.notecharIDImage identification number, NN.N, will be [LRC2017] A370 NN.N in Simbadmeta.id;meta.mainfloatf_ID[i] Flag on ID (1)meta.codecharRAJ2000Right ascension (J2000)degpos.eq.ra;meta.mainDEJ2000Declination (J2000)degpos.eq.dec;meta.mainz? Redshiftsrc.redshiftfloatnullablen_zNote on z (1)meta.notecharzrangeRedshift range for redshift fitsrc.redshift;pos.heliocentriccharSimbadSimbad column added by the CDSmeta.ref.urlcharJ/MNRAS/469/3946/table2Cluster memberszRedshiftsrc.redshiftfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDCluster member identification, ClNN, will be [LRC2017] A370 ClNN in Simbadmeta.code.membercharRAJ2000Right ascension (J2000)degpos.eq.ra;meta.mainDEJ2000Declination (J2000)degpos.eq.dec;meta.mainF435WmagHST F435W magnitudemagphot.mag;em.opt.BfloatF606WmagHST F606W magnitudemagphot.mag;em.opt.RfloatF814WmagHST F814W magnitudemagphot.mag;em.opt.IfloatTypeList mission/absorption lines refer to the most prominent features seen in the galaxy's spectrummeta.noteJ/MNRAS/469/3946/table3Other foreground and background objectsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDForeground and background object designation (FNN or BNN), will be [LRC2017] ANN in Simbadmeta.id;instr.backgroundcharRAJ2000Right ascension (J2000)degpos.eq.ra;meta.mainDEJ2000Declination (J2000)degpos.eq.dec;meta.mainzRedshiftsrc.redshiftfloatTypeList mission/absorption lines refer to the most prominent features seen in the spectrummeta.noteSimbadSimbad column added by the CDSmeta.ref.urlchar