J/A+A/587/A70ivo://CDS.VizieR/J/A+A/587/A70doi:10.26093/cds/vizier.35870070CDSSanchez-Menguiano L.Sanchez S.F.Perez I.Garcia-Benito R.,Husemann B.Mast D.Mendoza A.Ruiz-Lara T.Ascasibar Y.,Bland-Hawthorn J.Cavichia O.Diaz A.I.Florido E.Galbany L.,Gonzalez Delgado R.M.Kehrig C.Marino R.A.Marquez I.Masegosa J.,Mendez-Abreu J.Molla M.Del Olmo A.Perez E.Sanchez-Blazquez P.,Stanishev V.Walcher C.J.Lopez-Sanchez A.R.(the Califa collaboration)2017-12-06T07:38:38Z2016-06-27T13:59:00ZCDS support team

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

cds-question@unistra.frgalaxieschemical-abundancesWe measured the gas abundance profiles in a sample of 122 face-on spiral galaxies observed by the CALIFA survey and included all spaxels whose line emission was consistent with star formation. This type of analysis allowed us to improve the statistics with respect to previous studies, and to properly estimate the oxygen distribution across the entire disc to a distance of up to 3-4 disc effective radii (r_e_). We confirm the results obtained from classical HII region analysis. In addition to the general negative gradient, an outer flattening can be observed in the oxygen abundance radial profile. An inner drop is also found in some cases. There is a common abundance gradient between 0.5 and 2.0r_e_ of {alpha}_O/H_=-0.075dex/r_e_ with a scatter of {sigma}=0.016dex/r_e_ when normalising the distances to the disc effective radius. By performing a set of Kolmogorov-Smirnov tests, we determined that this slope is independent of other galaxy properties, such as morphology, absolute magnitude, and the presence or absence of bars. In particular, barred galaxies do not seem to display shallower gradients, as predicted by numerical simulations. Interestingly, we find that most of the galaxies in the sample with reliable oxygen abundance values beyond ~2 effective radii (57 galaxies) present a flattening of the abundance gradient in these outer regions. This flattening is not associated with any morphological feature, which suggests that it is a common property of disc galaxies. Finally, we detect a drop or truncation of the abundance in the inner regions of 27 galaxies in the sample; this is only visible for the most massive galaxies.2016A&A...587A..70Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/587/A70CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/A+A/559/A114 : Updated O3N2 and N2 abundance indicators (Marino+, 2013)J/A+A/573/A59 : Gas kinematics in CALIFA survey (Garcia-Lorenzo+, 2015)J/A+A/576/A135 : CALIFA DR2 (Garcia-Benito+, 2015)J/A+A/581/A103 : CALIFA survey across the Hubble sequence (Gonzalez+, 2015)J/A+A/582/A21 : Merging galaxies (mis)alignments (Barrera-Ballesteros+, 2015)J/A+A/584/A87 : CALIFA sample SFR calibration (Catalan-Torrecilla+, 2015)J/A+A/585/A47 : CALIFA color/metallicity gradients connections (Marino+, 2016)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/587/A70https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/587/A70http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/587/A70https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/587/A70https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/587/A70http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/587/A70GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapdefaultJ/A+A/587/A70/tablea1Fundamental properties and oxygen abundance informationrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameGalaxy namemeta.id;meta.maincharMTypeMorphological typesrc.morph.typechargMAGg-band absolute magnitudemagphys.magAbsfloatlogMasslog10 of the integrated stellar masslog(solMass)phys.massfloatreDisc effective radiuskpcphys.size.radiusfloat[O/H]reOxygen abundance value at one effective radiusstat.value;phys.abundfloate_[O/H]rerms uncertainty on [O/H]restat.error;phys.abundfloatalpha[O/H]Slope of the oxygen abundance gradient measured between 0.5 and 2.0 re (in dex/re)spect.indexfloate_alpha[O/H]rms uncertainty on slopestat.error;pos.eq.rafloatCCCorrelation coefficient of the linear fitmeta.notefloatSimbadSimbad column added by the CDSmeta.ref.urlcharNEDSimbad column added by the CDSmeta.ref.urlchar