J/ApJ/753/121ivo://CDS.VizieR/J/ApJ/753/121doi:10.26093/cds/vizier.17530121CDSKnobel C.Lilly S.J.Iovino A.Kovac K.Bschorr T.J.Presotto V.,Oesch P.A.Kampczyk P.Carollo C.M.Contini T.Kneib J.-P.,Le Fevre O.Mainieri V.Renzini A.Scodeggio M.Zamorani G.,Bardelli S.Bolzonella M.Bongiorno A.Caputi K.Cucciati O.,de la Torre S.de Ravel L.Franzetti P.Garilli B.Lamareille F.,Le Borgne J.-F.Le Brun V.Maier C.Mignoli M.Pello R.Peng Y.,Perez Montero E.Silverman J.Tanaka M.Tasca L.Tresse L.Vergani D.,Zucca E.Barnes L.Bordoloi R.Cappi A.Cimatti A.Coppa G.,Koekemoer A.M.Lopez-Sanjuan C.McCracken H.J.Moresco M.Nair P.,Pozzetti L.Welikala N.2017-10-16T14:58:12Z2014-03-17T14:59:11ZCDS support team

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

cds-question@unistra.frgalaxiescatalogsredshiftedWe present an optical group catalog between 0.1<~z<~1 based on 16500 high-quality spectroscopic redshifts in the completed zCOSMOS-bright survey. The catalog published herein contains 1498 groups in total and 192 groups with more than five observed members. The catalog includes both group properties and the identification of the member galaxies. Based on mock catalogs, the completeness and purity of groups with three and more members should be both about 83% with respect to all groups that should have been detectable within the survey, and more than 75% of the groups should exhibit a one-to-one correspondence to the "real" groups. Particularly at high redshift, there are apparently more galaxies in groups in the COSMOS field than expected from mock catalogs. We detect clear evidence for the growth of cosmic structure over the last seven billion years in the sense that the fraction of galaxies that are found in groups (in volume-limited samples) increases significantly with cosmic time. In the second part of the paper, we develop a method for associating galaxies that only have photo-z to our spectroscopically identified groups. We show that this leads to improved definition of group centers, improved identification of the most massive galaxies in the groups, and improved identification of central and satellite galaxies, where we define the former to be galaxies at the minimum of the gravitational potential wells. Subsamples of centrals and satellites in the groups can be defined with purities up to 80%, while a straight binary classification of all group and non-group galaxies into centrals and satellites achieves purities of 85% and 75%, respectively, for the spectroscopic sample.2012ApJ...753..121Khttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/753/121CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toVII/265 : COSMOS Morphological Catalog (V1.1) (Tasca+ 2009)II/284 : COSMOS Multi-Wavelength Photometry Catalog (Capak+, 2007)J/A+A/510/A56 : zCOSMOS type-2 AGN (Bongiorno, 2010)J/ApJ/721/98 : Morphology of 70um COSMOS galaxies (Kartaltepe+, 2010)J/ApJ/709/572 : COSMOS 70um sources (Kartaltepe+, 2010)J/ApJ/697/1842 : zCOSMOS 10K sample group catalog to z=1 (Knobel+, 2009)J/ApJS/184/218 : The zCOSMOS 10k-bright spectroscopic sample (Lilly+, 2009)J/AJ/138/1261 : Spitzer/MIPS observations of the COSMOS field (Frayer+, 2009)J/ApJS/172/70 : zCOSMOS-bright catalog (Lilly+, 2007)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/753/121https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/753/121http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/753/121https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/753/121https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/753/121http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/753/121GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/753/121/table4 (The zCOSMOS 20k group catalog)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/753/121/table4?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/753/121/table4?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/753/121/table4?GETtext/xml+votable180.050000true150.022092.013280.005555555555555556Cone search capability for table J/ApJ/753/121/table5 (Spec-z and photo-z group galaxies)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/753/121/table5?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/753/121/table5?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/753/121/table5?GETtext/xml+votable180.050000true149.998372.035140.0055555555555555565/6814 6/27245 27247 27344https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/753/121?format=asciiOpticaldefaultJ/ApJ/753/121/table4The zCOSMOS 20k group catalogrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGrpID[0/1497]? Group running identification numbermeta.id;meta.mainintnullableprimaryNgTotal number of group members in table5meta.ref.urlintnullableNm[2/33] Number of spectroscopic membersmeta.numberintNc[2/97] Corrected richness (1)meta.numberintRAJ2000Right Ascension in decimal degrees (J2000) (2)degpos.eq.ra;meta.mainDEJ2000Declination in decimal degrees (J2000) (2)degpos.eq.dec;meta.main<z>[0.04/1.2] Mean redshift of spec-z group memberssrc.redshift;pos.heliocentricfloatrad[0.1/1] Physical fudge radius (3)Mpcphys.size.radiusfloatDisp[0/1147]? Velocity dispersion (4)km/sphys.veloc.dispersionintnullablelogM[11.7/14.3] Log of DM halo fudge mass; Sec. 4.2 (3)log(solMass)phys.massfloatGRP2[0/1] Group purity parameter (5)stat.paramfloatSimbadSimbad column added by the CDSmeta.ref.urlcharJ/ApJ/753/121/table5Spec-z and photo-z group galaxiesDEJ2000Declination in decimal degrees (J2000)degpos.eq.dec;meta.mainrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintzCOSMOS[700014/960006] Galaxy identifiermeta.id;meta.mainintNpNumber of possible parent groups for this sourcemeta.ref.urlintnullableGrpID[0/1497]? Group running identification numbermeta.id.parentintnullable20k[0/1] The 20k flag (1=spec-z available)meta.codeintGAP2[-1/1] Galaxy purity parameter (1)stat.paramintRAJ2000Right Ascension in decimal degrees (J2000)degpos.eq.ra;meta.mainz[0.008/1.3] Redshift (2)src.redshiftfloatlogM[0/12.1] Log of stellar mass (3)log(solMass)phys.massfloatPAs[0/1] Association probability (4)stat.fit.goodnessfloatPMa[0/1] Probability to be most massive (5)stat.fit.goodnessfloatPAd[0/1] Additional probability (6)stat.fit.goodnessfloatL07Display the zCOSMOS-bright data from Cat. J/ApJS/172/70meta.ref.urlintnullableCOSMOSDisplay the COSMOS multi-wavelength phot. (Cat. II/284) within 1"meta.ref.urlcharSimbadSimbad column added by the CDSmeta.ref.urlchar