J/MNRAS/475/4148ivo://CDS.VizieR/J/MNRAS/475/4148doi:10.26093/cds/vizier.74754148CDSGalametz A.Pentericci L.Castellano M.Mendel T.Hartley W.G.,Fossati M.Finoguenov A.Almaini O.Beifiori A.Fontana A.Grazian A.,Scodeggio M.Kocevski D.D.2024-08-18T20:18:08Z2021-05-05T10:32:16ZCDS support team

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

cds-question@unistra.frgalaxy-clustersgalaxiescatalogsredshiftedWe present a large-scale galaxy structure Cl J021734-0513 at z~0.65 discovered in the UKIDSS UDS field, made of ~20 galaxy groups and clusters, spreading over 10Mpc. We report on a VLT/VIMOS spectroscopic follow-up program that, combined with past spectroscopy, allowed us to confirm four galaxy clusters (M_200_~10^14^M_{sun}_) and a dozen associated groups and star-forming galaxy overdensities. Two additional filamentary structures at z~0.62 and 0.69 and foreground and background clusters at 0.6<z<0.7 were also confirmed along the line of sight. The structure subcomponents are at different formation stages. The clusters have a core dominated by passive galaxies and an established red sequence. The remaining structures are a mix of star-forming galaxy overdensities and forming groups. The presence of quiescent galaxies in the core of the latter shows that 'pre-processing' has already happened before the groups fall into their more massive neighbours. Our spectroscopy allows us to derive spectral index measurements e.g. emission/absorption line equivalent widths, strength of the 4000{AA} break, valuable to investigate the star formation history of structure members. Based on these line measurements, we select a population of 'post-starburst' galaxies. These galaxies are preferentially found within the virial radius of clusters, supporting a scenario in which their recent quenching could be prompted by gas stripping by the dense intracluster medium. We derive stellar age estimates using Markov Chain Monte Carlo-based spectral fitting for quiescent galaxies and find a correlation between ages and colours/stellar masses which favours a top-down formation scenario of the red sequence. A catalogue of ~650 redshifts in UDS is released alongside the paper (via MNRAS online data).2018MNRAS.475.4148Ghttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/475/4148CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/ApJS/206/10 : CANDELS multiwavelength catalog (Galametz+, 2013)J/ApJ/801/97 : GOODS-S+UDS stellar mass catalogs from CANDELS (Santini+, 2015)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/475/4148https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/475/4148http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/475/4148https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/475/4148https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/475/4148http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/475/4148GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/475/4148/table1 (Clusters/groups candidates at 0.6<=z<=0.7 in UKIDSS UDS)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/475/4148/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/475/4148/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/475/4148/table1?GETtext/xml+votable180.050000true34.3942917-5.22227780.005555555555555556Cone search capability for table J/MNRAS/475/4148/table2 (VIMOS spectroscopic redshifts in the UKIDSS UDS field)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/475/4148/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/475/4148/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/475/4148/table2?GETtext/xml+votable180.050000true34.5210417-5.27405560.0055555555555555566/17677 17679 17688 17690https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/475/4148?format=asciidefaultJ/MNRAS/475/4148/table1Clusters/groups candidates at 0.6<=z<=0.7 in UKIDSS UDSSimbadNameSimbad column added by the CDSmeta.idcharnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDName, UNN or CNN (1)meta.id;meta.maincharprimaryn_ID[b] Note (2)meta.notecharRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainzphPhotometric redshiftsrc.redshiftfloatzclindicates redshift estimation(s) in table 3meta.ref.urlcharJ/MNRAS/475/4148/table2VIMOS spectroscopic redshifts in the UKIDSS UDS fieldSimbadNameSimbad column added by the CDSmeta.idcharnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameGalaxy namemeta.id;meta.maincharRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainzspSpectroscopic redshiftsrc.redshiftfloatq_zspRedshift quality flagmeta.code.qualcharSpTypeSpectral type flag (1)meta.codecharJ/MNRAS/475/4148/table3Redshift of groups and clusters in UDSrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDName, UNN or CNNmeta.id;meta.maincharn_ID[cd] Note on ID (1)meta.notecharNNumber of sources used for first cluster z calculationmeta.numberintN2? Number of sources used for second cluster z calculationmeta.numberintnullablezclFirst cluster redshift estimationsrc.redshift;pos.heliocentricfloate_zcl? rms uncertainty on zclstat.errorfloatnullablezcl2? Second cluster redshift estimationsrc.redshift;pos.heliocentricfloatnullableCase[1/4] Method used to derive cluster redshift estimates (2)meta.codeint