J/other/RAA/17.4ivo://CDS.VizieR/J/other/RAA/17.41doi:10.26093/cds/vizier/dx/bhkebCDSGao Y.-L.Lian J.-H.Kong X.Lin Z.-S.Hu N.Liu H.-Y.Wang E.-C.,Cao Z.-H.Hou Y.-H.Wang Y.-F.Zhang Y.2026-02-10T20:07:22Z2017-09-01T11:15:37ZCDS support team

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

cds-question@unistra.frgalaxiesredshiftedchemical-abundancesspectroscopyWe present a sample of 48 metal-poor galaxies at z<0.14 selected from 92 510 galaxies in the LAMOST survey. These galaxies are identified by their detection of the auroral emission line [OIII]{lambda}4363 above the 3{sigma} level, which allows a direct measurement of electron temperature and oxygen abundance. The emission line fluxes are corrected for internal dust extinction using the Balmer decrement method. With electron temperature derived from [OIII]{lambda}{lambda}4959,5007/[OIII]{lambda}4363 and electron density from [SII]{lambda}6731/[SII]{lambda}6717, we obtain the oxygen abundances in our sample which range from 12+log(O/H)=7.63(0.09Z_{sun}_) to 8.46 (0.6Z_{sun}_). We find an extremely metal-poor galaxy with 12+log(O/H)=7.63+/-0.01. With multiband photometric data from FUV to NIR and H{alpha} measurements, we also determine the stellar masses and star formation rates, based on the spectral energy distribution fitting and H{alpha} luminosity, respectively. We find that our galaxies have low and intermediate stellar masses with 6.39<=log(M/M_{sun}_)<=9.27, and high star formation rates (SFRs) with -2.18<=log(SFR/M_{sun}_yr^-1^)<=1.95. We also find that the metallicities of our galaxies are consistent with the local T_e_-based mass-metallicity relation, while the scatter is about 0.28dex. Additionally, assuming the coefficient of {alpha}=0.66, we find most of our galaxies follow the local mass-metallicity-SFR relation, but a scatter of about 0.24dex exists, suggesting the mass-metallicity relation is weakly dependent on SFR for those metal-poor galaxies.2017RAA....17...41Ghttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/other/RAA/17.41CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toV/146 : LAMOST DR1 catalogs (Luo+, 2015)V/149 : LAMOST DR2 catalogs (Luo+, 2016)http://dr4.lamost.org : LAMOST DR4 Home Pagehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/other/RAA/17.41https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/other/RAA/17.41http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/other/RAA/17.41https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/other/RAA/17.41https://vizier.iucaa.in/viz-bin/votable?-source=J/other/RAA/17.41http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/other/RAA/17.41GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/other/RAA/17.41/table1 (The metal-poor galaxies in LAMOST survey)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/other/RAA/17.41/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/other/RAA/17.41/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/other/RAA/17.41/table1?GETtext/xml+votable180.050000true0.043524.931250.0055555555555555566/16 28 598 4117 4162 4814 5235 5359 5666 5669 5685 5796 5800 5882 6467 8351 9095 10553 10808 11115 12365 17654 17779 17784 17894 18014 18038 18903 19191 19198 19223 19256 19504 19711 23195 23230 27053 27124 27325 27334 27635 27735 27741 27765 27975 28345 28493https://cdsarc.cds.unistra.fr/viz-bin/moc/J/other/RAA/17.41?format=asciiOpticaldefaultJ/other/RAA/17.41/table1The metal-poor galaxies in LAMOST surveyrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDSequential number (1)meta.recordintRAJ2000Right ascension (J2000) (2)degpos.eq.ra;meta.mainDEJ2000Declinaiton (J2000) (2)degpos.eq.dec;meta.mainzRedshift (2)src.redshiftfloatI([OII])Intensity of [OII]{lambda}3727 line relative to I(H{beta}) (3)spect.line.intensityfloatI([OIII]a)Intensity of [OIII]{lambda}4363 line relative to I(H{beta}) (3)spect.line.intensity;em.line.OIIIfloatI([OIII]b)Intensity of [OIII]{lambda}4953 line relative to I(H{beta}) (3)spect.line.intensity;em.line.OIIIfloatI([OIII]c)Intensity of [OIII]{lambda}5007 line relative to I(H{beta}) (3)spect.line.intensity;em.line.OIIIfloatI(Ha)Intensity of H{alpha} line relative to I(H{beta}) (3)spect.line.intensity;em.line.HalphafloatI([SII]a)Intensity of [SII]{lambda}6717 line relative to I(H{beta}) (3)spect.line.intensityfloatI([SII]b)Intensity of [SII]{lambda}6731 line relative to I(H{beta}) (3)spect.line.intensityfloatI(Hb)Intensity of H{beta} line (4)1e-20W.m**-2spect.line.intensity;em.line.HbetadoubleEW(Hb)H{beta} equivalent width (5)0.1nmspect.line.eqWidth;em.line.HbetafloatE(B-V)Nebular color excess (6)magphot.color.excessfloatTeElectron temperature for [OIII] line (7)10000Kphys.temperature.electron;phys.electronfloatneElectron density (8)cm**-3phys.density;phys.electronfloat12+log(O/H)TeOxygen abundance, 12+log(O/H)Tephys.abundfloatlogMMasslog(solMass)phys.massfloatlogSFRStar formation ratelog(solMass.yr**-1)phys.SFRfloatSDSS[0/1] Detected by SDSS ? (9)meta.codeinte_I([OII])rms uncertainty on I([OII])stat.errorfloate_I([OIII]a)rms uncertainty on I([OIII]a)stat.errorfloate_I([OIII]b)rms uncertainty on I([OIII]b)stat.errorfloate_I([OIII]c)rms uncertainty on I([OIII]c)stat.errorfloate_I(Ha)rms uncertainty on I(Ha)stat.errorfloate_I([SII]a)rms uncertainty on I([SII]a)stat.errorfloate_I([SII]b)rms uncertainty on I([SII]b)stat.errorfloate_I(Hb)rms uncertainty on I(Hb)1e-20W.m**-2stat.errorfloate_EW(Hb)rms uncertainty on EW(Hb)0.1nmstat.errorfloate_E(B-V)rms uncertainty on E(B-V)magstat.errorfloate_Terms uncertainty on Te10000Kstat.errorfloate_nerms uncertainty on necm**-3stat.errorfloate_12+log(O/H)Terms uncertainty on 12+log(O/H)Testat.errorfloate_logMMass rms uncertainty on logMlog(solMass)stat.errorfloate_logSFRrms uncertainty on logSFRlog(solMass.yr**-1)stat.error;phys.SFRfloatSloanDisplay the online SDSS data for this galaxymeta.ref.urlchar