J/PASP/121/117ivo://CDS.VizieR/J/PASP/121/117doi:10.26093/cds/vizier.61210117CDSWoolf V.M.Lepine S.Wallerstein G.2025-09-09T14:13:31Z2009-06-07T14:36:19ZCDS support team

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

cds-question@unistra.frdwarf-starsm-starschemical-abundancesWe have calculated Fe and Ti abundances in 12 low-metallicity main sequence M stars using high-resolution spectra. These subdwarf and extreme-subdwarf stars allow us to extend our calibration of a method to determine cool-dwarf-star metallicities using molecular band strength indices from low-resolution spectra. Our calibration can now be used to determine metallicity to within +/-0.3dex for stars with [Fe/H] between -1.5 and +0.05 and temperatures between 3500 and 4000K. We also report a method to estimate temperatures for M dwarfs using equivalent width measurements of the infrared CaII triplet and the KI line at 7699{AA}. Our metallicity measurements show that the recently proposed classification system for low-mass stars (dwarfs, subdwarfs, extreme subdwarfs, and ultrasubdwarfs) does represent a metallicity sequence, with the ultrasubdwarfs the most metal-poor stars.2009PASP..121..117Whttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/PASP/121/117CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/PASP/121/117https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/PASP/121/117http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/PASP/121/117https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/PASP/121/117https://vizier.iucaa.in/viz-bin/votable?-source=J/PASP/121/117http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/PASP/121/117GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/PASP/121/117/table1 (M and K dwarf magnitudes and parallaxes)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/PASP/121/117/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/PASP/121/117/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/PASP/121/117/table1?GETtext/xml+votable180.050000true38.551904217.7640250.0055555555555555566/8 356 590 1332 5487 10554 12705 13576 13816 14248 14614 28472https://cdsarc.cds.unistra.fr/viz-bin/moc/J/PASP/121/117?format=asciiOpticaldefaultJ/PASP/121/117/table1M and K dwarf magnitudes and parallaxesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameStar namemeta.id;meta.maincharprimaryLSPMLSPM designation (JHHMM+DDMM, Cat. I/298)meta.idcharSpTypeSpectral type (4)src.spTypecharVmag? V magnitude (1)magphot.mag;em.opt.Vfloatnullablee_Vmag? rms uncertainty on Vmagmagstat.error;phot.mag;em.opt.VfloatnullableKsmagKs magnitude (2)magphot.mag;em.IR.Kfloate_Ksmagrms uncertainty on Ksmagmagstat.error;phot.mag;em.IR.KfloatHmag? H magnitude (2)magphot.mag;em.IR.Hfloatnullablee_Hmag? rms uncertainty on Hmagmagstat.error;phot.mag;em.IR.Hfloatnullableplx? Parallaxmaspos.parallax.trigfloatnullablee_plx? rms uncertainty on plxmasstat.error;pos.parallaxfloatnullabler_plxReference for plx (3)meta.ref;pos.framecharSimbadSimbad column added by the CDSchar_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.main_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.mainJ/PASP/121/117/table3Fe and Ti line datarecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameStar namemeta.id;meta.maincharElElementphys.atmol.elementcharlambdaWavelength0.1nmem.wlfloatchiExcitation potentialeVphys.atmol.excitationfloatloggfOscillator strengthphys.atmol.oscStrengthfloatEWEquivalent width0.1pmspect.line.eqWidthintlogNAbundancephys.abundfloat