J/MNRAS/499/5022ivo://CDS.VizieR/J/MNRAS/499/5022doi:10.26093/cds/vizier.74995022CDSDutta R.Fumagalli M.Fossati M.Lofthouse E.K.Prochaska J.X.,Arrigoni Battaia F.Bielby R.M.Cantalupo S.Cooke R.J.Murphy M.T.,O'Meara J.M.2025-02-28T20:16:02Z2023-11-15T17:58:02ZCDS support team

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

cds-question@unistra.frquasarsgalaxy-groupsredshiftedstar-forming-regionsline-intensitiesvisible-astronomyspectroscopyWe present a study of the metal-enriched cool halo gas traced by MgII absorption around 228 galaxies at z~0.8-1.5 within 28 quasar fields from the MUSE Analysis of Gas around Galaxies survey. We observe no significant evolution in the MgII equivalent width versus impact parameter relation and in the MgII covering fraction compared to surveys at z~<0.5. The stellar mass, along with distance from galaxy centre, appears to be the dominant factor influencing the MgII absorption around galaxies. With a sample that is 90 per cent complete down to a star formation rate of ~0.1M_{sun}_/yr and up to impact parameters ~250-350kpc from quasars, we find that the majority (67^+12^_-15_ per cent or 14/21) of the MgII absorption systems are associated with more than one galaxy. The complex distribution of metals in these richer environments adds substantial scatter to previously reported correlations. Multiple galaxy associations show on average five times stronger absorption and three times higher covering fraction within twice the virial radius than isolated galaxies. The dependence of MgII absorption on galaxy properties disfavours the scenario in which a widespread intragroup medium dominates the observed absorption. This leaves instead gravitational interactions among group members or hydrodynamic interactions of the galaxy haloes with the intragroup medium as favoured mechanisms to explain the observed enhancement in the MgII absorption strength and cross-section in rich environments.2020MNRAS.499.5022Dhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/499/5022CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/MNRAS/491/2057 : MAGG I Near pristine gas cloud at z~3.5https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/499/5022https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/499/5022http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/499/5022https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/499/5022https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/499/5022http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/499/5022GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/499/5022/tables1 (Properties of the MgII absorption lines detected in the adopted quasar spectra)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/499/5022/tables1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/499/5022/tables1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/499/5022/tables1?GETtext/xml+votable180.050000true16.58016670.80647220.005555555555555556Cone search capability for table J/MNRAS/499/5022/tables2 (Properties of the galaxies studied in this work)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/499/5022/tables2?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/499/5022/tables2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/499/5022/tables2?GETtext/xml+votable180.050000true16.5798750.80544440.0055555555555555566/8912 8914 16417 17317 17735 17805 17816 17895 18007 18032 18200 18466 18521 20016 23099 25413 26167 26369 26882 27083 27341 27549 27578 27845 29795 31313 35241 36320 47941 48166https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/499/5022?format=asciiOpticaldefaultJ/MNRAS/499/5022/tables1Properties of the MgII absorption lines detected in the adopted quasar spectraSimbadNameSimbad column added by the CDSmeta.idcharnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintQuasarQuasar name (JHHMMSS.ss+DDMMSS.s)meta.id;meta.maincharSpectraInstrument name (HIRES, MIKE, UVES or XSHOOTER)meta.id;instrcharzabsRedshift (1)src.redshiftdoubleEWMgIIRest-frame equivalent width0.1nmspect.line.eqWidthfloate_EWMgIIError on EWMgII0.1nmstat.errorfloatl_logN[>= ] Limit flag on logNmeta.code.errorcharlogNLogarithm of the MgII column densitylog(cm**-2)phys.columnDensityfloate_logN? Error on logNlog(cm**-2)stat.errorfloatnullableDv90Velocity width containing 90 per cent of the total optical depth of the absorption profile {Delta}v_90_ (1)km/sspect.line.widthint_RAPositions from quasar name (right ascension part)degpos.eq.ra;meta.main_DEPositions from quasar name (declination part)degpos.eq.dec;meta.mainJ/MNRAS/499/5022/tables2Properties of the galaxies studied in this workSimbadSimbad column added by the CDSmeta.ref.urlcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGalaxyGalaxy name (JHHMMSS.ss+DDMMSS.s)meta.id;meta.maincharzRedshift (1)src.redshiftdoubleRImpact parameter from the quasar (2)kpcsrc.impactParamintlogMass? Logarithm of the stellar masslog(solMass)phys.massfloatnullablee_logMass? Lower error on logMasslog(solMass)stat.error;phys.massfloatnullableE_logMass? Upper error on logMasslog(solMass)stat.error;stat.maxfloatnullableSFRStar formation rate derived from [OII] (3)solMass/yrphys.SFRfloate_SFRLower error on SFRsolMass/yrstat.error;phys.SFRfloatE_SFRUpper error on SFRsolMass/yrstat.error;stat.maxfloatMethIDMethod of identification (4)meta.codecharEnvflagEnvironment flag (5)meta.codecharl_EWMgII[=< ] Limit flag on EWMgIImeta.code.errorcharEWMgIIRest-frame equivalent width (6)0.1nmspect.line.eqWidthfloate_EWMgII? Error on EWMgII0.1nmstat.errorfloatnullable_RAPositions from galaxy name (right ascension part)degpos.eq.ra;meta.main_DEPositions from galaxy name (declination part)degpos.eq.dec;meta.main