J/A+A/512/A63ivo://CDS.VizieR/J/A+A/512/A63doi:10.26093/cds/vizier.35120063CDSMagrini LStanghellini L.Corbelli E.Galli D.Villaver E.2017-06-12T08:24:45Z2010-05-04T09:19:37ZCDS support team

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

cds-question@unistra.frgalaxiesh-ii-regionschemical-abundancesWe analyze the spatial distribution of metals in M33 using a new sample and literature data of HII regions, constraining a model of galactic chemical evolution with HII region and planetary nebula (PN) abundances. We consider chemical abundances of a new sample of HII regions complemented with previous literature data-sets. Supported by a uniform sample of nebular spectroscopic observations, we conclude that: i) the metallicity distribution in M33 is very complex, showing a central depression in metallicity probably due to observational bias; ii) the metallicity gradient in the disk of M33 has a slope of -0.037+/-0.009dex/kpc in the whole radial range up to ~8kpc, and -0.044+/-0.009dex/kpc excluding the central kpc; iii) there is a small evolution of the slope with time from the epoch of PN progenitor formation to the present-time. Description: Emission line fluxes, observed and dereddened of 33 HII regions are presented. Physical and chemical properties, such as electron temperatures and density, ionic and total chemical abundances of He, O, N, Ne, Ar, S, are derived.2010A&A...512A..63Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/512/A63CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/AJ/110/2739 : H-alpha emitting regions in M33 (Calzetti+ 1995)J/ApJ/505/793 : New WR star in M33 (Massey+, 1998)J/ApJS/120/247 : Supernova remnants in M33 (Gordon+, 1999)J/PASP/111/685 : HII regions of M33. II. (Hodge+, 1999)J/A+A/367/498 : Candidate Planetary Nebulae in M 33 (Magrini+, 2001)J/ApJ/614/167 : Planetary nebulae in M33 (Ciardullo+, 2004)J/A+A/444/831 : New star clusters in M33 (Bedin+, 2005)J/A+A/448/1247 : XMM-Newton survey of M33 (Misanovic+, 2006)J/A+A/476/1161 : Spitzer photometry of M33 (Verley+, 2007)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/512/A63https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/512/A63http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/512/A63https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/512/A63https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/512/A63http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/512/A63GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/512/A63/m33h2 (Observed HII regions in M33, with physical and chemical properties)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/512/A63/m33h2?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/512/A63/m33h2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/512/A63/m33h2?GETtext/xml+votable180.050000true23.12291730.6021940.0055555555555555566/2154-2155 2240-2241https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/512/A63?format=asciiOpticaldefaultJ/A+A/512/A63/m33h2Observed HII regions in M33, with physical and chemical propertiesS/H? S total abundancephys.abunddoublenullablen_Seq[nc] new or control samplemeta.notecharSeqSequential numbermeta.recordintrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameHII region namemeta.id;meta.maincharprimaryT.OIII? Electron temperature [OIII]Kphys.temperature.electron;phys.electronintnullableT.SIII? Electron temperature [SIII]Kphys.temperature.electron;phys.electronintnullableT.NII? Electron temperature [NII]Kphys.temperature.electron;phys.electronintnullableN.SII? Electron density [SII]cm**-3phys.density;phys.electronintnullableHeI/H? Helium I abundancephys.abundfloatnullableOI/H? OI ionic abundancephys.abunddoublenullableOII/H? OII ionic abundancephys.abunddoublenullableOIII/H? OIII ionic abundancephys.abunddoublenullableO/H? O total abundancephys.abunddoublenullableNII/H? NII ionic abundancephys.abunddoublenullableICF(N)? Ionization correction factor Narith.factorfloatnullableN/H? N total abundancephys.abunddoublenullableNeIII/H? NeIII ionic abundancephys.abunddoublenullableICF(Ne)? Ionization correction factor Nearith.factorfloatnullableNe/H? Ne total abundancephys.abunddoublenullableArIII/H? ArIII ionic abundancephys.abunddoublenullableICF(Ar)? Ionization correction factor Ararith.factorfloatnullableAr/H? Ar total abundancephys.abunddoublenullableSII/H? SII ionic abundancephys.abunddoublenullableSIII/H? SIII ionic abundancephys.abunddoublenullableICF(S)? Ionization correction factor Sarith.factorfloatnullableRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainSNameSimbad namemeta.idcharSimbadSimbad column added by the CDScharJ/A+A/512/A63/table2Emission line fluxes observed and dereddened, with their errors, of 33 HII regionsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameHII region namemeta.id;obs.fieldcharc(Hb)Nebular extinction coefficient c(H{beta})phys.absorptionfloate_c(Hb)Error on c(Hb)stat.errorfloatIonIon namephys.atmol.ionStagecharlambdaRest frame wavelength0.1nmem.wlintFlux? Observed flux (H{beta}=100)phot.fluxfloatnullablee_Flux? Error on observed fluxstat.error;phot.fluxfloatnullableInt? Intensity (dereddened flux, H{beta}=100)spect.line.intensity;arith.ratiofloatnullable