J/A+A/559/A2ivo://CDS.VizieR/J/A+A/559/A2doi:10.26093/cds/vizier.35590002CDSGalametz A.Stern D.Pentericci L.De Breuck C.Vernet J.,Wylezalek D.Fassbender R.Hatch N.Kurk J.Overzier R.Rettura A.,Seymour N.2017-06-27T06:37:58Z2014-04-22T07:41:29ZCDS support team

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

cds-question@unistra.frgalaxy-clustersredshiftedspectroscopyWe present the spectroscopic confirmation of a structure of galaxies surrounding the radio galaxy MRC 0156-252 at z=2.02. The structure was initially discovered as an overdensity of both near-infrared selected z>1.6 and mid-infrared selected z>1.2 galaxy candidates. We used the VLT/FORS2 multi-object spectrograph to target ~80 high-redshift galaxy candidates, and obtain robust spectroscopic redshifts for more than half the targets. The majority of the confirmed sources are star-forming galaxies at z>1.5. In addition to the radio galaxy, two of its close-by companions (<6") also show AGN signatures. Ten sources, including the radio galaxy, lie within |z-2.020|<0.015 (i.e., velocity offsets <1500km/s) and within projected 2Mpc comoving of the radio galaxy. Additional evidence suggests not only that the galaxy structure associated with MRC 0156-252 is a forming galaxy cluster but also that this structure is most probably embedded in a larger-scale structure.2013A&A...559A...2Ghttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/559/A2CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/559/A2https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/559/A2http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/559/A2https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/559/A2https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/559/A2http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/559/A2GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/559/A2/tables (Results of the spectrocopic observations)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/559/A2/tables?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/559/A2/tables?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/559/A2/tables?GETtext/xml+votable180.050000true29.6395-24.9922250.0055555555555555566/36392https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/559/A2?format=asciiOpticaldefaultJ/A+A/559/A2/tablesResults of the spectrocopic observationsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMSimbad column added by the CDSmeta.id;meta.datasetcharID[130/4439] Identification numbermeta.id;meta.mainintRAJ2000Right ascension (J2000) (1)pos.eq.ra;meta.mainDEJ2000Declination (J2000) (1)pos.eq.dec;meta.mainSelSelection criteria (3)meta.codecharzspSpectroscopic redshiftsrc.redshiftfloate_zsprms uncertainty on zspstat.errorfloatq_zsp[B] low-quality redshifts are marked by Bmeta.code.qualcharlinesAbsoption/emission line or spectral features (2)meta.noteTypeGalaxy type (QSO, RG=Radui Galaxy, Type-2 AGN, or star-forming galaxy)src.classcharSimbadSimbad column added by the CDSmeta.ref.urlchar