J/ApJ/735/71ivo://CDS.VizieR/J/ApJ/735/71doi:10.26093/cds/vizier.17350071CDSWerk J.K.Putman M.E.Meurer G.R.Santiago-Figueroa N.2017-06-20T13:17:38Z2013-05-16T08:52:38ZCDS support team

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

cds-question@unistra.frchemical-abundancesgalaxiesh-ii-regionsvisible-astronomyh-alpha-photometryccd-photometryspectroscopyWe present a search for outlying HII regions in the extended gaseous outskirts of nearby (D<40Mpc) galaxies and subsequent multi-slit spectroscopy used to obtain the HII region nebular oxygen abundances. The galaxies in our sample have extended HI disks and/or interaction-related HI features that extend well beyond their primary stellar components. We report oxygen abundance gradients out to 2.5 times the optical radius for these galaxies which span a range of morphologies and masses. We analyze the underlying stellar and neutral HI gas distributions in the vicinity of the HII regions to understand the physical processes that give rise to the observed metal distributions in galaxies. These measurements, for the first time, convincingly show flat abundance distributions out to large radii in a wide variety of systems and have broad implications for galaxy chemodynamical evolution.2011ApJ...735...71Whttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/735/71CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toVIII/77 : HI spectral properties of galaxies (Springob+, 2005)J/AJ/139/279 : Outlying HII regions in HI-selected galaxies (Werk+, 2010)J/ApJS/190/233 : Spectroscopy & abundances of SINGS galaxies (Moustakas+, 2010)J/ApJ/695/580 : Oxygen abundance in M83 (Bresolin+, 2009)J/ApJS/165/307 : SINGG I. (Meurer+, 2006)J/ApJS/164/81 : Spectrophotometry of nearby galaxies (Moustakas+, 2006)J/ApJ/636/214 : HII regions in dwarf irregular galaxies (van Zee+, 2006)J/MNRAS/361/1063 : Oxygen abundances of HII regions (Perez-Montero+, 2005)J/A+A/422/511 : Oxygen abundance in M101 HII regions (Cedres+, 2004)J/ApJS/153/429 : SDSS strong emission line HII galaxies (Kniazev+, 2004)J/A+A/414/23 : CCD H{alpha} and R photometry of 334 galaxies (James+, 2004)J/A+A/393/389 : H{alpha} in HII regions in spiral galaxies (Marquez+, 2002)J/A+A/370/765 : HI synthesis observations in UMa cluster (Verheijen+, 2001)J/ApJ/510/104 : Ionizing Stars of Extragalactic H II Regions (Bresolin+ 1999)J/ApJS/105/93 : H II Regions in Nearby Seyfert Galaxies (Evans+ 1996)http://www.nrao.edu/astrores/HIrogues/ : online HI Rogues cataloghttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/735/71https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/735/71http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/735/71https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/735/71https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/735/71http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/735/71GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/735/71/table1 (Properties of the galaxies in the HI Rogues sample)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/735/71/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/735/71/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/735/71/table1?GETtext/xml+votable180.050000true94.6587578.3573060.005555555555555556Cone search capability for table J/ApJ/735/71/hiireg (HII region properties for 13 "HI Rogues" (2001ASPC..240..657H) galaxies)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/735/71/hiireg?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/735/71/hiireg?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/735/71/hiireg?GETtext/xml+votable180.050000true94.56208378.3301110.0055555555555555566/4439 5504 5596 5793 5976 6034 6040 7498 8106 8225 9190 9639 27383 27641 276432.762881831355591e-19 3.3785437584409506e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/735/71?format=asciiOpticaldefaultJ/ApJ/735/71/table1Properties of the galaxies in the HI Rogues samplerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGalGalaxy name (NGC or UGC)meta.id;meta.maincharprimaryNNumber of HII regions usedmeta.numberintRAJ2000Hour of right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of declination (J2000)pos.eq.dec;meta.mainDistRedshift-independent distance from NEDMpcpos.distance;pos.heliocentricfloatR25Length of the 25th magnitude elliptical isophote (R_25_) semimajor axiskpcphys.angSize;srcfloatE(B-V)Color excess from Schlegel et al. (1998ApJ...500..525S)magphot.color.excessfloat(O/H)Average oxygen abundance as 12+log(O/H)phys.abundfloatr_(O/H)(O/H) reference (1)meta.ref;pos.frameint[NII]/HaRatio [NII]{lambda}6583/H{alpha}phys.abundfloatr_[NII]/HaReference for [NII]/Ha (1)meta.ref;pos.frameintHIMorphHI morphology code from the HI Rogues catalog (2)meta.code;src.morphBeam1Beam size of HI observationarcsecphys.angSize;em.line.HI;obsfloatBeam2Beam size of HI observationarcsecphys.angSize;em.line.HI;obsfloatAuthHI reference author's name(s)meta.bib.author;pos.framecharBibCodeBibcode for HI referencemeta.bib.bibcodecharM*Stellar mass (3)1e+10solMassphys.massdoubleMHIHI mass for the galaxy (4)1e+10solMassphys.massfloatSFRDerived SFR from the total H{alpha} luminosity obtained from the MDM 2.4m imagessolMass/yrphys.SFRfloatSimbadSimbad column added by the CDSmeta.refcharNEDSimbad column added by the CDSmeta.refcharJ/ApJ/735/71/hiiregHII region properties for 13 "HI Rogues" (2001ASPC..240..657H) galaxiesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGalGalaxy name (NGC or UGC)meta.id.parentcharIDHII region number (slit mask ID)meta.id;obs.fieldintRAJ2000Hour of right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of declination (J2000)pos.eq.dec;meta.mainR/R25Projected distance from the 25th magnitude elliptical isophotepos.distancefloatRprojProjected distance from the galaxy centerkpcpos.distancefloatFHaH{alpha} flux from MDM 2.4m images (in units of 10^-15^erg/s/cm^2^)aW.m**-2phot.flux;em.line.Halphafloate_FHaFHa uncertaintyaW.m**-2stat.errorfloatl_RmagLimit flag on Rmag (1)meta.code.errorcharRmagR-band apparent AB magnitude from MDM 2.4m images (1)magphot.mag;em.opt.Rfloate_RmagRmag uncertainty (1)magstat.error;phot.mag;em.opt.Rfloat[OII]? Reddening corrected [OII]3727 emission-line strength (2)spect.line.intensity;arith.ratiointnullable[OIII]? Reddening corrected [OIII]4959 and {lambda}5007 summed emission-line strength (2)spect.line.intensity;arith.ratiointnullable(O/H)Strong-line oxygen abundance as 12+log(O/H) (3)phys.abundfloatf_(O/H)Flag on (O/H)meta.codechar(O/H)2? Second value of the 12+log(O/H) oxygen abundance (upper-branch R23) (3)phys.abundfloatnullable