J/MNRAS/454/3664ivo://CDS.VizieR/J/MNRAS/454/3664doi:10.26093/cds/vizier.74543664CDSBresolin F.Kennicutt R.C.2024-08-15T20:16:10Z2016-09-20T13:21:01ZCDS support team

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

cds-question@unistra.frgalaxiesh-ii-regionschemical-abundancesWe acquired spectra of 141 HII regions in 10 late-type low surface brightness galaxies (LSBGs). The analysis of the chemical abundances obtained from the nebular emission lines shows that metallicity gradients are a common feature of LSBGs, contrary to previous claims concerning the absence of such gradients in this class of galaxies. The average slope, when expressed in units of the isophotal radius, is found to be significantly shallower in comparison to galaxies of high surface brightness. This result can be attributed to the reduced surface brightness range measured across their discs, when combined with a universal surface mass density-metallicity relation. With a similar argument we explain the common abundance gradient observed in high surface brightness galaxy (HSBG) discs and its approximate dispersion. This conclusion is reinforced by our result that LSBGs share the same common abundance gradient with HSBGs, when the slope is expressed in terms of the exponential disc scalelength.2015MNRAS.454.3664Bhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/454/3664CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/454/3664https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/454/3664http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/454/3664https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/454/3664https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/454/3664http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/454/3664GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/454/3664/table1 (Galaxy sample)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/454/3664/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/454/3664/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/454/3664/table1?GETtext/xml+votable180.050000true114.0545-70.71116670.005555555555555556Cone search capability for table J/MNRAS/454/3664/table3 (Reddening-corrected fluxes)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/454/3664/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/454/3664/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/454/3664/table3?GETtext/xml+votable180.050000true114.051667-70.7009720.0055555555555555566/2071 8906 24631 24778 28310 34335 37407 44203 44584 45928https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/454/3664?format=asciidefaultJ/MNRAS/454/3664/table1Galaxy samplerdB-band exponential disc scalelengthkpcphys.sizeintrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGalGalaxy namemeta.id;meta.maincharprimaryRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainMTypeMorphological typesrc.morph.typecharDistDistanceMpcpos.distancefloatBMAGAbsolute B magnitudemagphys.magAbs;em.opt.BfloatPAPosition angledegpos.posAngintiInclinationdegsrc.orbital.inclinationintr25Radius of the 25Bmag/arcsec^2^ isophotearcsecphys.angSizeinte_r25rms uncertainty on r25arcsecstat.errorfloate_rdrms uncertainty on rdkpcstat.errorfloatSuBrB(0)Dereddened B-band surface brightnessmag.arcsec**-2phot.mag.sb;em.opt.Bfloatn_SuBrB(0)[*] Note on SuBrB(0) (1)meta.notecharRefReferences (2)meta.refcharSimbadSimbad column added by the CDSmeta.ref.urlcharJ/MNRAS/454/3664/table3Reddening-corrected fluxesr/r_25Radius in r25 unitsphys.size.radius;arith.ratiofloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGalGalaxy namemeta.id.parentcharIDHII region sequential number within the galaxymeta.idintRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.main[OII]3727? Reddening-corrected flux in [OII]3727 line (on F(Hb)=100 scale)spect.line.intensity;arith.ratiointnullablee_[OII]3727? rms uncertainty on [OII]3727stat.errorintnullable[OIII]4363? Reddening-corrected flux in [OIII]4363 line (on F(Hb)=100 scale)spect.line.intensity;arith.ratiofloatnullablee_[OIII]4363? rms uncertainty on [OIII]4363stat.errorfloatnullable[OIII]5007Reddening-corrected flux in [OIII]5007 line (on F(Hb)=100 scale)spect.line.intensity;arith.ratiointe_[OIII]5007rms uncertainty on [OIII]5007stat.errorint[NII]6583Reddening-corrected flux in [NII]6583 line (on F(Hb)=100 scale)spect.line.intensity;arith.ratiointe_[NII]6583rms uncertainty on [NII]6583stat.errorint[SII]6731+6717? Reddening-corrected flux in [SII]6731+6717 line (on F(Hb)=100 scale)spect.line.intensity;arith.ratiointnullablee_[SII]6731+6717? rms uncertainty on [SII]6731+6717stat.errorintnullablec(Hb)H{beta} extinction coefficientphys.absorption.coeff;spect.linefloatFHbMeasure flux in the H{beta} emission linemW.m**-2phot.flux;em.line.Hbeta;spect.linedouble