J/ApJS/240/15ivo://CDS.VizieR/J/ApJS/240/15doi:10.26093/cds/vizier.22400015CDSStocke J.T.Keeney B.A.Danforth C.W.Oppenheimer B.D.Pratt C.T.,Berlind A.A.Impey C.Jannuzi B.2021-08-18T09:18:58Z2019-05-28T08:14:38ZCDS support team

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

cds-question@unistra.fractive-galactic-nucleispectroscopyultraviolet-astronomygalaxy-kinematicsredshiftedgalaxiesvisible-astronomyA small survey of the UV-absorbing gas in 12 low-z galaxy groups has been conducted using the Cosmic Origins Spectrograph on board the Hubble Space Telescope. Targets were selected from a large, homogeneously selected sample of groups found in the Sloan Digital Sky Survey. A critical selection criterion excluded sight lines that pass close (<1.5 virial radii) to a group galaxy, to ensure absorber association with the group as a whole. Deeper galaxy redshift observations are used both to search for closer galaxies and also to characterize these 10^13.5^-10^14.5^M_{sun}_ groups, the most massive of which are highly virialized with numerous early-type galaxies (ETGs). This sample also includes two spiral-rich groups, not yet fully virialized. At group-centric impact parameters of 0.3-2Mpc, these signal-to-noise ratios = 15-30 spectra detected HI absorption in 7 of 12 groups; high (OVI) and low (SiIII) ion metal lines are present in two-thirds of the absorption components. None of the three most highly virialized, ETG-dominated groups are detected in absorption. Covering fractions >~50% are seen at all impact parameters probed, but do not require large filling factors despite an enormous extent. Unlike halo clouds in individual galaxies, group absorbers have radial velocities that are too low to escape the group potential well without doubt. This suggests that these groups are "closed boxes" for galactic evolution in the current epoch. Evidence is presented that the cool and warm group absorbers are not a pervasive intra-group medium (IGrM), requiring a hotter (T~10^6^-10^7^K) IGrM to be present to close the baryon accounting.2019ApJS..240...15Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/240/15CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toB/hst : HST Archived Exposures Catalog (STScI, 2007)J/ApJ/559/654 : Ly{alpha} absorption systems. V. (Chen+, 2001)J/ApJS/167/1 : Galaxy groups and clusters from SDSS (Berlind+, 2006)J/ApJ/679/194 : Low-z intergalactic medium. III. (Danforth+, 2008)J/ApJ/740/91 : Ly{alpha} and OVI in galaxies around quasars (Prochaska+, 2011)J/ApJ/788/119 : Properties of the highly ionized gas of quasars (Lehner+, 2014)J/ApJ/791/128 : Basic galaxy data for spiral-rich group members (Stocke+, 2014)J/MNRAS/449/3263 : Extended galaxy halo gas through HI and OVI (Johnson+, 2015)J/ApJ/804/79 : HST/COS obs. of QSOs within 600kpc of M31 (Lehner+, 2015)J/MNRAS/449/2345 : Mass & luminosity of maxBCG galaxies groups (Proctor+, 2015)J/ApJ/814/40 : Nearby galaxy filaments with UV obs. (Wakker+, 2015)J/ApJ/817/111 : HST/COS survey of z<0.9 AGNs. I. (Danforth+, 2016)J/ApJS/230/6 : HST -COS & -STIS absorption-line spectrosc. II. (Keeney+, 2017)J/ApJS/237/11 : Galaxy z survey near HST/COS AGN sight lines (Keeney+, 2018)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/240/15https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJS/240/15http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJS/240/15https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJS/240/15https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJS/240/15http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJS/240/15GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJS/240/15/groups (HST/COS observations (table 1), group properties from SDSS analysis (table 2), detections in group sight lines (tables 3) and adopted group properties (table 8))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/240/15/groups?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/240/15/groups?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/240/15/groups?GETtext/xml+votable180.050000true129.42344.2950.005555555555555556Cone search capability for table J/ApJS/240/15/table7 (Members of all 12 galaxy groups)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/240/15/table7?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/240/15/table7?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/240/15/table7?GETtext/xml+votable180.050000true129.3983888944.325363060.0055555555555555566/5123 5312 5876 6515 6518 9038 9039 9064 9066 9348 10624 11013 31289 31291https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJS/240/15?format=asciiUVOpticaldefaultJ/ApJS/240/15/groupsHST/COS observations (table 1), group properties from SDSS analysis (table 2), detections in group sight lines (tables 3) and adopted group properties (table 8)RAsdegQSO sight line right ascension (J2000)degpos.eq.raDelrho[128/704] {Delta}{rho} value (5)pos;arith.diffintrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGID[12833/50433] Group IDmeta.id;meta.mainintprimaryAGNAGN target abbreviated namemeta.id.assoccharf_AGNFlag on AGN (1)meta.codecharzAGN[0.1/0.6] AGN redshiftsrc.redshift;pos.heliocentricfloatDateUT date of observationtime.epoch;obsnullableCoaddDate of the coadded visittime.epochnullableExp[4.8/25.4] Exposure timekstime.duration;obs.exposurefloatl_FfuvLimit flag on Ffuvmeta.code.errorcharFfuv[1/12] HST/COS FUV flux in 10-15erg/s/cm^2^/{AA}1e-17W.m**-2.nm**-1phot.flux;em.UVintf_FfuvFlag on Ffuv (1)meta.codecharS/N[11/29] Signal-to-noise ratiostat.snrintNotesNotes (observing program(s))meta.notecharf_NotesFlag on Notes (1)meta.notecharN0[3/10] Number of group members from SDSS analysismeta.numberintRAJ2000[129.4/243.6] Group centroid right ascension in decimal degrees (J2000)degpos.eq.ra;meta.maine_RAJ2000[0.01/0.07] RAdeg uncertaintydegstat.error;pos.eq.rafloatDEJ2000[-2.1/50.8] Group centroid declination in decimal degrees (J2000)degpos.eq.dec;meta.maine_DEJ2000[0.009/0.06] DEdeg uncertaintydegstat.error;pos.eq.decfloatz0[0.1/0.2] Group redshift from SDSS analysissrc.redshift;pos.heliocentricdoublee_z0[0.0002/0.001] z0 uncertaintystat.errordoublelogM0[13.7/14.7] log of group mass from SDSS analysislog(solMass)phys.massfloate_logM0[0.2/0.4] logM0 uncertaintylog(solMass)stat.errorfloatSig0[322/632] Group velocity dispersion from SDSS analysiskm/sphys.veloc.dispersionintDEsdegQSO sight line declination (J2000)degpos.eq.decrho/R0[0.3/1.4] Impact parameter (2)src.impactParamfloatAbsAbsorption component notesmeta.notecharRAGdeg[129.4/243.6] Adopted right ascension (J2000)degpos.eq.raDEGdeg[-2.1/50.8] Adopted declination (J2000)degpos.eq.deczgrp[0.1/0.2] Adopted group redshiftsrc.redshift;pos.heliocentricdoubleNgrp[6/116] Number of group galaxiesmeta.numberintlogMgrp[13.5/14.7] log of total group mass (3)log(solMass)phys.massfloatRgrp[667/1553] Group virial radiuskpcphys.size.radius;pos.lgintSiggrp[270/628] Group velocity dispersionkm/sphys.veloc.dispersionintRobs[178/1546] Observed group radiuskpcphys.size.radius;pos.lgintSigobs[170/569] Observed velocity dispersionkm/sphys.veloc.dispersionintrho*/Rgrp[0.3/2.1] Impact parameter from the group centroid as a fraction of Rgrp {rho}*/R_grp_ (4)src.impactParamfloatDelnu[-823/271] {Delta}{nu} value (5)pos;arith.diffintfsp[31.3/68] Group's spiral fraction (6)meta.numberfloatSloanDisplay the online SDSS data for the nearest objectmeta.ref.urlcharSimbadSimbad column added by the CDSmeta.ref.urlcharJ/ApJS/240/15/table7Members of all 12 galaxy groupsSimbadNameSimbad column added by the CDSmeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGID[12833/50433] Group identification numbermeta.idintNameMember name (1)meta.id;meta.maincharRAJ2000[129/243.7] Right ascension (J2000)degpos.eq.ra;meta.mainDEJ2000[-2.3/51] Declination (J2000)degpos.eq.dec;meta.mainzgal[0.1/0.2] Galaxy spectroscopic redshiftsrc.redshiftdoubleLum[0.1/16.6] Galaxy luminositysolLumphys.luminosityfloatTypeGalaxy's spectral type (2)src.spTypechardrho[13/2912] Projected spatial displacement (3)kpcpos.angDistanceintdv[-1956/1537] Velocity displacement (3)km/sphys.veloc;arith.diffintfmem[21.2/100] Probability of group membership (4)%statfloatK18Display data from Keeney+, 2018, J/ApJS/237/11 within 0.5"meta.ref.urlintnullableSloanDisplay the online SDSS data for the nearest objectmeta.ref.urlchar