J/A+A/405/531ivo://CDS.VizieR/J/A+A/405/531doi:10.26093/cds/vizier.34050531CDSSchultheis M.Lancon A.Omont A.Schuller F.Ojha D.K.2017-06-29T08:55:25Z2003-08-24T14:54:35ZCDS support team

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

cds-question@unistra.frinfrared-sourcesinfrared-astronomyspectroscopyinfrared-photometryline-intensitiesIn this work we present near-IR spectra (HK-band) of a sample of 107 sources with mid-IR excesses at 7 and 15{mu}m detected during the ISOGAL survey. Making use of the DENIS interstellar extinction map from Schultheis et al. (1999, Cat. <J/A+A/349/L69>) we derive luminosities and find that the Mbol vs. ^12^CO and Mbol vs. H_2_O diagrams are powerful tools for identifying supergiants, AGB stars, giants and young stellar objects. The majority of our sample are AGB stars (~80%) while we find four good supergiant candidates, nine young stellar objects and 12 RGB candidates. We have used the most recent K_0_-[15] relation by Jeong et al. (2002, in Mass-losing Pulsating tars and their Circumstellar Matter, ed. Y. Nakasa, M. Honma, & M. Sekiin) based on recent theoretical modeling of dust formation of AGB stars to determine mass-loss rates. The mass-loss rates of the supergiants are comparable with those in the solar neighbourhood while the long-period Variables cover a mass-loss range from -5<log(dM/dt)<-7. The red giant candidates lie at the lower end of the mass-loss rate range between -6.5<log(dM/dt)<-9. We used the equivalent width of the CO bandhead at 2.3 mum, the NaI doublet and the CaI triplet to estimate metallicities using the relation by Ramirez et al. (2000ApJ...537..205R). The metallicity distribution of the ISOGAL objects shows a mean [Fe/H]~-0.25dex with a dispersion of +/-0.40dex which is in agreement with the values of Ramirez et al. (2000ApJ...537..205R) for Galactic Bulge fields between b=-4{deg} and b=-1.3{deg}. A comparison with the solar neighbourhood sample of Lancon & Wood (2000, Cat. <J/A+AS/146/217>) shows that our sample is ~0.5dex more metal-rich on average.2003A&A...405..531Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/405/531CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/349/L69 : Interstellar extinction (Schultheis+, 1999)J/A+AS/146/217 : Library of Spectra (0.5 to 2.5um) of Cool Stars (Lancon+ 2000)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/405/531https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/405/531http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/405/531https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/405/531https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/405/531http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/405/531GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/405/531/table1 (Positions, photometric and spectroscopic indices of observed ISOGAL sources)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/405/531/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/405/531/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/405/531/table1?GETtext/xml+votable180.050000true266.099167-29.1486940.0055555555555555565/7206 6/28808 28830https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/405/531?format=asciiInfrareddefaultJ/A+A/405/531/table1Positions, photometric and spectroscopic indices of observed ISOGAL sourcesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameObject namemeta.id;meta.maincharRAJ2000Right ascension (J2000.0)pos.eq.ra;meta.mainDEJ2000Declination (J2000.0)pos.eq.dec;meta.mainJmagDENIS J magnitudemagphot.mag;em.IR.JfloatKmagDENIS K magnitudemagphot.mag;em.IR.Kfloat[7]mag? ISOGAL 7 magnitudemagphot.mag;em.IR.4-8umfloatnullable[15]mag? ISOGAL 15 magnitudemagphot.flux.density;em.IR.8-15umfloatnullableAvAbsorption in V bandmagphys.absorptionfloatEWCOEquivalent width of CO band0.1nmspect.line.eqWidthfloatEWNaEquivalent width of Na line0.1nmspect.line.eqWidthfloatEWCaEquivalent width of Ca line0.1nmspect.line.eqWidthdoubleEWH2OEquivalent width of H2O band0.1nmspect.line.eqWidthdoubleMbolBolometric absolute magnitudemagphys.magAbs.bolfloatlog(dM/dt)Mass-loss ratelog(solMass.yr**-1)phys.mass.lossfloatTypeType of objectsrc.classcharspFileFile name in "spectra" subdirectorymeta.id;meta.filechar