J/ApJ/887/80ivo://CDS.VizieR/J/ApJ/887/80doi:10.26093/cds/vizier.18870080CDSKreckel K.Ho I.-T.Blanc G.A.Groves B.Santoro F.Schinnerer E.,Bigiel F.Chevance M.Congiu E.Emsellem E.Faesi C.Glover S.C.O.,Grasha K.Kruijssen J.M.D.Lang P.Leroy A.K.Meidt S.E.McElroy R.,Pety J.Rosolowsky E.Saito T.Sandstrom K.Sanchez-Blazquez P.,Schruba A.2022-09-02T09:46:49Z2021-06-10T09:33:40ZCDS support team

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

cds-question@unistra.frgalaxiesh-ii-regionsvisible-astronomyspectroscopychemical-abundancesThe distribution of metals within a galaxy traces the baryon cycle and the buildup of galactic disks, but the detailed gas phase metallicity distribution remains poorly sampled. We have determined the gas phase oxygen abundances for 7138 HII regions across the disks of eight nearby galaxies using Very Large Telescope/Multi Unit Spectroscopic Explorer (MUSE) optical integral field spectroscopy as part of the PHANGS-MUSE survey. After removing the first-order radial gradients present in each galaxy, we look at the statistics of the metallicity offset ({Delta}O/H) and explore azimuthal variations. Across each galaxy, we find low ({sigma}=0.03-0.05dex) scatter at any given radius, indicative of efficient mixing. We compare physical parameters for those HII regions that are 1{sigma} outliers toward both enhanced and reduced abundances. Regions with enhanced abundances have high ionization parameter, higher H{alpha} luminosity, lower H{alpha} velocity dispersion, younger star clusters, and associated molecular gas clouds showing higher molecular gas densities. This indicates recent star formation has locally enriched the material. Regions with reduced abundances show increased H{alpha} velocity dispersions, suggestive of mixing introducing more pristine material. We observe subtle azimuthal variations in half of the sample, but cannot always cleanly associate this with the spiral pattern. Regions with enhanced and reduced abundances are found distributed throughout the disk, and in half of our galaxies we can identify subsections of spiral arms with clearly associated metallicity gradients. This suggests spiral arms play a role in organizing and mixing the interstellar medium.2019ApJ...887...80Khttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/887/80CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/345 : Gaia DR2 (Gaia Collaboration, 2018)J/ApJ/424/599 : Abundances in barred spiral galaxies (Martin+ 1994)J/ApJ/510/104 : Ionizing Stars of Extragalactic H II Regions (Bresolin+ 1999)J/ApJS/132/37 : Spectroscopy of Southern warm IR galaxies (Kewley+, 2001)J/A+A/459/L13 : A composite HII region luminosity function (Bradley+, 2006)J/A+A/459/85 : O/H and gas densities in star-forming galaxies (Nagao+, 2006)J/ApJS/173/185 : GALEX ultraviolet atlas of nearby galaxies (Gil de Paz+, 2007)J/ApJ/661/801 : Ionization in neutral gas galaxies. III. (Oey+, 2007)J/ApJ/675/1213 : Abundances in M33 HII regions (Rosolowsky+, 2008)J/AJ/142/139 : A new catalog of HII regions in M31 (Azimlu+, 2011)J/ApJ/738/27 : Galactic HII regions RRL and continuum data (Balser+, 2011)J/ApJ/755/40 : HII reg. in Magellanic clouds from MCELS (Pellegrini+, 2012)J/A+A/559/A114 : Updated O3N2 and N2 abundance indicators (Marino+, 2013)J/MNRAS/445/881 : LVL global optical photometry (Cook+, 2014)J/AJ/147/131 : Abundances of nearby late-type galaxies. I. (Pilyugin+, 2014)J/ApJ/806/199 : RRL and continuum data of 21 Galactic HII reg. (Balser+, 2015)J/ApJ/806/16 : CHemical Abundances of Spirals. I. NGC628 (Berg+, 2015)J/ApJ/808/42 : CHemical Abundances of Spirals. II. M51 (Croxall+, 2015)J/MNRAS/455/2627 : Oxygen abundance gradient in M81 (Arellano-Cordova+, 2016)J/ApJ/830/4 : HII region abundances in NGC 5457 (M101) (Croxall+, 2016)J/A+A/615/A40 : OB stars in N206 in the LMC (Ramachandran+, 2018)J/ApJ/860/172 : Cloud-scale molecular gas properties in 15 gal. (Sun+, 2018)J/ApJ/882/9 : Gas-phase metallicity in MaNGA gal. (Sanchez-Menguiano+, 2019)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/887/80https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/887/80http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/887/80https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/887/80https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/887/80http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/887/80GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/887/80/table1 (*Key parameters of our galaxy sample)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/887/80/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/887/80/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/887/80/table1?GETtext/xml+votable180.050000true24.173938115.78364110.005555555555555556Cone search capability for table J/ApJ/887/80/table2 (HII region catalog)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/887/80/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/887/80/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/887/80/table2?GETtext/xml+votable180.050000true24.1751161115.784356110.0055555555555555566/17747 17753 18398 27728 27861 28167 33920-33921 40328 46549https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/887/80?format=asciiOpticaldefaultJ/ApJ/887/80/table1*Key parameters of our galaxy samplerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGalGalaxy namemeta.id;meta.maincharprimaryDist[9.77/16.8] DistanceMpcpos.distance;pos.heliocentricfloate_Dist[0.82/5.6] Dist uncertaintyMpcstat.errorfloatTypeMorphological typesrc.morph.typecharlogM[9.6/10.6] Log of stellar masslog(solMass)phys.massfloatlogSFR[-0.31/0.74] Log of stellar formation ratelog(solMass.yr**-1)arith.rate;phys.SFRfloatSimbadSimbad column added by the CDSmeta.ref.urlcharNEDNED column added by the CDSmeta.ref.urlcharLEDAmeta.ref.urlcharPA[1.6/179.8] Position angledegpos.posAngfloatInc[8.7/55] Inclinationdegsrc.orbital.inclinationfloatR25[1.5/5.1] Galactic radius at 25mag/arcsec^2^ from HyperLedaarcminphys.angSize;pos.galacticfloatAres[0.5/1] Angular resolutionarcsecpos.angResolutionfloatPres[38/70] Physical resolutionpcpos.angResolutionintNreg[223/1824] Number of HII regionsmeta.numberintArea[42/191] Survey areakpc**2phys.areaint_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.main_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.mainJ/ApJ/887/80/table2HII region catalogGalGalaxy namemeta.id.part;meta.mainchare_S2-6731[70/25000] Uncertainty in S2-6731 (2)1e-20mW.m**-2stat.errorfloatS3-9069[0/4650000] Integrated [SIII](9069{AA}) line flux (2)1e-20mW.m**-2phot.flux;spect.linedoublee_S3-9069[0/4700000] Uncertainty in S3-9069 (2)1e-20mW.m**-2stat.errorfloat12+log(0/H)[8.1/8.7] log gas phase oxygen abundancephys.abundfloate_12+log(0/H)[0/0.21] Uncertainty in 12+log(0/H)stat.errorfloatSimbadSimbad column added by the CDSmeta.ref.urlcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDRegion identifier within Galmeta.id.part;meta.mainintRAJ2000[24.13/353.64] Right Ascension (J2000)degpos.eq.ra;meta.mainDEJ2000[-59.3/15.82] Declination (J2000)degpos.eq.dec;meta.mainRad[0/0.98] Radius normalized to the galactic radius at 25 mag/arcsec^2^phys.size.radiusfloatE(B-V)[0/1.7] The (B-V) color excessmagphot.color.excessfloate_E(B-V)[0/0.08] Uncertainty in E(B-V)magstat.errorfloatLHa[8.8e+35/1.9e+40] H{alpha} line luminosity (1)1e-07Wphys.luminosity;em.line.Halphadoublee_LHa[1.4e+34/4.3e+36] Uncertainty in LHa (1)1e-07Wstat.errorfloatHb[945/39200000] Integrated H{beta} line flux (2)1e-20mW.m**-2phot.flux;spect.linedoublee_Hb[340/140000] Uncertainty in Hb (2)1e-20mW.m**-2stat.errorfloatO3-5007[293/7070000] Integrated [OIII](5007{AA}) line flux (2)1e-20mW.m**-2phot.flux;spect.linedoublee_O3-5007[110/50000] Uncertainty in O3-5007 (2)1e-20mW.m**-2stat.errorfloatN2[1180/44800000] Integrated [NII](6548+6584{AA}) line fluxes (2)1e-20mW.m**-2phot.flux;spect.linedoublee_N2[170/88000] Uncertainty in N2 (2)1e-20mW.m**-2stat.errorfloatHa[2620/112000000] Integrated H{alpha} line flux (2)1e-20mW.m**-2phot.flux;spect.linedoublee_Ha[530/200000] Uncertainty in Ha (2)1e-20mW.m**-2stat.errorfloatS2-6716[615/13500000] Integrated [SII](6716{AA}) line flux (2)1e-20mW.m**-2phot.flux;spect.linedoublee_S2-6716[86/31000] Uncertainty in S2-6716 (2)1e-20mW.m**-2stat.errorfloatS2-6731[422/11000000] Integrated [SII](6731{AA}) line flux (2)1e-20mW.m**-2phot.flux;spect.linedouble