J/ApJ/636/214ivo://CDS.VizieR/J/ApJ/636/214doi:10.26093/cds/vizier.16360214CDSvan Zee L.Haynes M.P.2017-06-21T08:21:30Z2008-04-16T17:46:40ZCDS support team

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

cds-question@unistra.frh-ii-regionschemical-abundancesgalaxiesvisible-astronomyWe present long-slit optical spectroscopy of 67 HII regions in 21 dwarf irregular galaxies to investigate the enrichment of oxygen, nitrogen, neon, sulfur, and argon in low-mass galaxies. Oxygen abundances are obtained via direct detection of the temperature-sensitive emission lines for 25 HII regions; for the remainder of the sample, oxygen abundances are estimated from strong-line calibrations. The direct abundance determinations are compared to the strong-line abundance calibrations of both McGaugh (1991ApJ...380..140M) and Pilyugin (2000A&A...362..325P).2006ApJ...636..214Vhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/636/214CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/AJ/116/2805 : H II regions in spiral galaxies (Van Zee+, 1998)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/636/214https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/636/214http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/636/214https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/636/214https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/636/214http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/636/214GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/636/214/table1 (Global galaxy parameters)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/636/214/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/636/214/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/636/214/table1?GETtext/xml+votable180.050000true0.092539.4962780.005555555555555556Cone search capability for table J/ApJ/636/214/table2 (Observing log)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/636/214/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/636/214/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/636/214/table2?GETtext/xml+votable180.050000true0.09916739.4952780.005555555555555556Cone search capability for table J/ApJ/636/214/table3 (HII region line strengths)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/636/214/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/636/214/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/636/214/table3?GETtext/xml+votable180.050000true0.090339.49490.005555555555555556Cone search capability for table J/ApJ/636/214/table6 (Parameters of additional dwarf irregular galaxies)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/636/214/table6?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/636/214/table6?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/636/214/table6?GETtext/xml+votable180.050000true149.8602530.74638890.005555555555555556Cone search capability for table J/ApJ/636/214/abund (HII region line rations and abundances)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/636/214/abund?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/636/214/abund?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/636/214/abund?GETtext/xml+votable180.050000true0.090339.49490.0055555555555555566/393 684 955 2130 2169 5168 5230 5287 5329 6320 6443 7022 7946 8908 9102 9277 10488 10607 10659 10762 11696 12570 18146 18287 18315 18378 18429 19125 19570 19717 19758 19779 20400 20476 22949 23528 27199 27383 27926 28149https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/636/214?format=asciiOpticaldefaultJ/ApJ/636/214/table1Global galaxy parametersrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGalaxyGalaxy namemeta.id;meta.maincharprimaryRAJ2000Hour of Right Ascension (J2000.0)pos.eq.ra;meta.mainDEJ2000Degree of Declination (J2000.0)pos.eq.dec;meta.mainMTypeMorphological typesrc.morph.typecharDistDistance (1)Mpcpos.distance;pos.heliocentricfloatR25Isophotal radius in arcsecarcsecphys.angSizeintR25kpcIsophotal radius in kpckpcphys.size.radiusfloatBMAGAbsolute B magnitude (2)magphys.magAbs;em.opt.Bfloat(B-V)0? (B-V)0 color index (2)magphot.color;em.opt.B;em.opt.Vfloatnullablee_(B-V)0? Error in (B-V)0magstat.errorfloatnullableMH/LBMass/luminosity ratio (gas richness)Sunphys.composition.massLightRatiofloatmu0B? Central surface brightnessmag.arcsec**-2phot.mag.sb;em.opt.BfloatnullablelogMdynDynamical masslog(solMass)phys.massfloat12+log(O/H)Oxygen abundance (3)phys.abundfloate_12+log(O/H)Error in 12+log(O/H)stat.errorfloatlog(N/H)Nitrogen abundance (3)phys.abundfloate_log(N/H)Error in log(N/H)stat.errorfloatSimbadNameSimbad column added by the CDSmeta.idcharHIIDisplay HII region in this Galaxymeta.ref.urlcharNEDSimbad column added by the CDScharJ/ApJ/636/214/table2Observing logNexpNumber of exposuresmeta.numberintTintIntegration timestime.epochintrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGalaxyGalaxy namemeta.id;meta.maincharSlitSlit numbermeta.notecharRAJ2000Hour of Right Ascension (J2000.0)pos.eq.ra;meta.mainDEJ2000Degree of Declination (J2000.0)pos.eq.dec;meta.mainPAPosition angledegpos.posAngintRunRun identificationmeta.idcharJ/ApJ/636/214/table3HII region line strengthsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGalaxyGalaxy name (G1)meta.id;meta.maincharSlitSlit numbermeta.notecharEWEast-West offset from the galaxy center (East positive) (G1)arcsecpos;arith.diffintNSNorth-South offset from the galaxy center (North positive) (G1)arcsecpos;arith.diffint[OII]Relative [OII]3727+3729{AA} line strength (1)spect.line.intensity;arith.ratiofloate_[OII]Error in [OII]stat.errorfloat[NeIII]? Relative [NeIII]3869{AA} line strength (1)spect.line.intensity;arith.ratiofloatnullablee_[NeIII]? Error in [NeIII]stat.errorfloatnullable[OIII]Relative [OIII]4959+5007 line strength (1)spect.line.intensity;arith.ratiofloate_[OIII]Error in [OIII]stat.errorfloat[OI]? Relative [OI]6300{AA} line strength (1)spect.line.intensity;arith.ratiofloatnullablee_[OI]? Error in [OI]stat.errorfloatnullable[SIII]? Relative [SIII]6312{AA} line strength (1)spect.line.intensity;arith.ratiofloatnullablee_[SIII]? Error in [SIII]stat.errorfloatnullableHalphaRelative H{alpha}6563{AA} line strength (1)spect.line.intensity;arith.ratiofloate_HalphaError in Halphastat.errorfloat[NII]? Relative [NII]6548+6584 line strength (1)spect.line.intensity;arith.ratiofloatnullablee_[NII]? Error in [NII]stat.errorfloatnullableHe? Relative He6678{AA} line strength (1)spect.line.intensity;arith.ratiofloatnullablee_He? Error in Hestat.errorfloatnullable[SII]Relative [SII]6717+6731{AA} line strength (1)spect.line.intensity;arith.ratiofloate_[SII]Error in [SII]stat.errorfloat[ArIII]? Relative [ArIII]7136{AA} line strength (1)spect.line.intensity;arith.ratiofloatnullablee_[ArIII]? Error in [ArIII]stat.errorfloatnullablecHbetaReddening coefficient C_H{beta}_phys.absorptionfloate_cHbetaError in cHbetastat.errorfloatEWHbetaH{beta} equivalent width0.1nmspect.line.eqWidth;em.line.HbetaintF(Hbeta)H{beta} flux (in units of 10^-15^ergs/s/cm^2^)1e-18W.m**-2phot.flux;em.line.Hbetafloat_RASimbad column added by the CDSdegpos.eq.ra;meta.main_DESimbad column added by the CDSdegpos.eq.dec;meta.mainJ/ApJ/636/214/table6Parameters of additional dwarf irregular galaxiesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGalaxyGalaxy namemeta.id;meta.maincharDistDistance (1)Mpcpos.distancefloatBMAGAbsolute B magnitude (2)magphys.magAbs;em.opt.Bfloat(B-V)0? (B-V)_0_ color index (2)magphot.color;em.opt.B;em.opt.Vfloatnullablee_(B-V)0? Error in (B-V)0 (2)magstat.errorfloatnullableMH/LBMass/luminosity ratio (gas richness) (2)Sunphys.composition.massLightRatiofloatmu0B? Central surface brightnessphot.mag.sb;em.opt.BfloatnullablelogMdyn? Dynamical masslog(solMass)phys.massfloatnullable12+log(O/H)Oxygen abundance (2)phys.abundfloate_12+log(O/H)Error in 12+log(O/H)stat.errorfloatlog(N/H)Nitrogen abundance (2)phys.abundfloate_log(N/H)Error in log(N/H)stat.errorfloatSimbadNameSimbad column added by the CDSmeta.idcharNEDSimbad column added by the CDSchar_RAComputed Right Ascension for Equinox: J2000degpos.eq.ra;meta.main_DEComputed Declination for Equinox: J2000degpos.eq.dec;meta.mainJ/ApJ/636/214/abundHII region line rations and abundancesSlitSlit numbermeta.notecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGalaxyGalaxy name (G1)meta.id;meta.maincharEWEast-West offset from the galaxy center (East positive) (G1)arcsecpos;arith.diffintNSNorth-South offset from the galaxy center (North positive) (G1)arcsecpos;arith.diffint[SII]The [SII] ratio (=I(6717)/I(6731)meta.notefloate_[SII]Error in [SII]stat.errorfloat[OIII]? The [OIII] ratio (=I(4959+5007)/I(4363))meta.notefloatnullablee_[OIII]? Error in [OIII]stat.errorfloatnullablelog([OII]+[OIII])log([OII]+[OIII])arith.zpfloate_log([OII]+[OIII])Error in log([OII]+[OIII])stat.errorfloatlog([OIII]/[OII])log([OIII]/[OII])arith.zpfloate_log([OIII]/[OII])Error in log([OIII]/[OII])stat.errorfloatlog([NII]/[OII])log([NII]/[OII])arith.zpfloate_log([NII]/[OII])Error in log([NII]/[OII])stat.errorfloatlog([SII]/[OII])? log([SII]/[OII])arith.zpfloatnullablee_log([SII]/[OII])? Error in log([SII]/[OII])stat.errorfloatnullableTe([OIII])Electron temperature from [OIII]Kphys.temperature.electron;phys.electronintE_Te([OIII])? Upper limit error in Te([OIII])Kstat.error;stat.maxintnullablee_Te([OIII])? Lower limit error in Te([OIII])Kstat.errorintnullable12+log(O/H)1Oxygen abundance from McGaugh (1991ApJ...380..140M)phys.abundfloat12+log(O/H)2Oxygen abundance from Pilyugin (2000A&A...362..325P)phys.abundfloat12+log(O/H)Oxygen abundancephys.abundfloate_12+log(O/H)Error in 12+log(O/H)stat.errorfloatlog(N/O)? log(N/O) abundance ratiophys.abund;arith.ratiofloatnullablee_log(N/O)? Error in log(N/O)stat.errorfloatnullablelog(Ne/O)? log(Ne/O) abundance ratiophys.abund;arith.ratiofloatnullablee_log(Ne/O)? Error in log(Ne/O)stat.errorfloatnullablelog(S/O)? log(S/O) abundance ratiophys.abund;arith.ratiofloatnullablee_log(S/O)? Error in log(S/O)stat.errorfloatnullablelog(Ar/O)? log(Ar/O) abundance ratiophys.abund;arith.ratiofloatnullablee_log(Ar/O)? Error in log(Ar/O)stat.errorfloatnullable_RASimbad column added by the CDSdegpos.eq.ra;meta.main_DESimbad column added by the CDSdegpos.eq.dec;meta.main