J/MNRAS/478/4293ivo://CDS.VizieR/J/MNRAS/478/4293doi:10.26093/cds/vizier.74784293CDSCarton D.Brinchmann J.Contini T.Epinat B.Finley H.Richard J.,Patricio V.Schaye J.Nanayakkara T.Weilbacher P.M.Wisotzki2024-08-18T20:20:07Z2018-07-05T08:05:25ZCDS support team

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

cds-question@unistra.frgalaxiescatalogschemical-abundancesredshiftedinterstellar-mediumGalaxies at low-redshift typically possess negative gas-phase metallicity gradients (centres more metal-rich than their outskirts). Whereas, it is not uncommon to observe positive metallicity gradients in higher-redshift galaxies (z<0.6). Bridging these epochs, we present gas-phase metallicity gradients of 84 star-forming galaxies between 0.08<z<0.84. Using the galaxies with reliably determined metallicity gradients, we measure the median metallicity gradient to be negative (-0.039^+0.007^_-0.009_dex/kpc). Underlying this, however, is significant scatter: (8+/-3)% [7] of galaxies have significantly positive metallicity gradients, (38+/-5)% [32] have significantly negative gradients, (31+/-5)% [26] have gradients consistent with being flat. (The remaining (23+/-5)% [19] have unreliable gradient estimates.) We notice a slight trend for a more negative metallicity gradient with both increasing stellar mass and increasing star formation rate (SFR). However, given the potential redshift and size selection effects, we do not consider these trends to be significant. Indeed, once we normalize the SFR relative to that of the main sequence, we do not observe any trend between the metallicity gradient and the normalized SFR. This is contrary to recent studies of galaxies at similar and higher redshifts. We do, however, identify a novel trend between the metallicity gradient of a galaxy and its size. Small galaxies (rd<3kpc) present a large spread in observed metallicity gradients (both negative and positive gradients). In contrast, we find no large galaxies (rd > 3 kpc) with positive metallicity gradients, and overall there is less scatter in the metallicity gradient amongst the large galaxies. These large (well-evolved) galaxies may be analogues of present-day galaxies, which also show a common negative metallicity gradient.2018MNRAS.478.4293Chttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/478/4293CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/478/4293https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/478/4293http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/478/4293https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/478/4293https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/478/4293http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/478/4293GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/478/4293/tablea1 (Metallicity, mass, SFR and morphological properties)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/478/4293/tablea1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/478/4293/tablea1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/478/4293/tablea1?GETtext/xml+votable180.050000true338.223925-60.560436940.0055555555555555566/27256 35935 45526https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/478/4293?format=asciidefaultJ/MNRAS/478/4293/tablea1Metallicity, mass, SFR and morphological propertiesSimbadNameSimbad column added by the CDSmeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintFieldTargeted field (1)meta.id;obs.fieldcharIDID number of galaxy within field (1)meta.id;obs.fieldintlogZ0[-0.714/0.696] Derived central metallicity (2)phys.abund.Zfloatb_logZ0[-0.854/-0.004] -1 sigma error on logZ0 (3)stat.errorfloatB_logZ0[0.002/0.5] ? +1 sigma error on logZ0 (4)stat.errorfloatdlogZ[-0.2615/0.2406] Derived metallicity gradient (2)kpc**-1arith.grad;phys.abund.Zfloatb_dlogZ[-0.3773/-0.0009] -1 sigma error on dlogZ (3)kpc**-1stat.errorfloatB_dlogZ[0.0009/0.2314] +1 sigma error on dlogZ (4)kpc**-1stat.errorfloatGradMetallicity gradient classificationmeta.code.class;phys.abund.ZcharMass[7.002/10.6] ? Stellar mass derived from MAGPHYS (2)log(solMass)phys.massfloatb_Mass[-0.315/0.0] -1 sigma error on Mass (3)log(solMass)stat.error;phys.massfloatB_Mass[0.0/0.365] +1 sigma error on Mass (4)log(solMass)stat.error;phys.massfloatSFR[-2.254/1.42] SFR derived from emission lines (2)log(solMass.yr**-1)phys.SFRfloatb_SFR[-0.573/-0.006] -1 sigma error on SFR (3)log(solMass.yr**-1)stat.error;phys.SFRfloatB_SFR[0.008/0.673] +1 sigma error on SFR (4)log(solMass.yr**-1)stat.error;phys.SFRfloatdSFR[-0.8/1.167] Galaxy SFR normalized relative to a galaxy with identical mass on the main sequencephys.SFR;arith.ratiofloate_dSFR[0.017/0.61] 1 sigma error on dSFRstat.errorfloatRAJ2000[53/338.3] Right ascension of galaxy centre (J2000)degpos.eq.ra;meta.mainDEJ2000[-60.58/2.08] Declination of galaxy centre (J2000)degpos.eq.dec;meta.mainz[0.0771/0.8441] Redshift derived from MUSE spectrasrc.redshiftfloatrd[0.15/6.71] Exponential disc scale lengthkpcsrc.morph.scLength;phys.sizefloatInc[0.58/70.0] Galaxy inclinationdegsrcfloatPA[-88.32/144.0] Position angle of galaxy's major axis on the sky, North=0, East=90degpos.posAng;obs.fieldfloat