J/AJ/119/1424ivo://CDS.VizieR/J/AJ/119/1424doi:10.26093/cds/vizier.51191424CDSHoudashelt M.L.Bell R.A.Sweigart A.V.Wing R.F.2023-04-06T16:50:36Z2000-05-16T21:33:35ZCDS support team

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

cds-question@unistra.frtwo-color-diagramsastronomical-modelsstellar-atmospheresvisible-astronomykron-cousins-photometryinfrared-photometrybroad-band-photometrym-starsAs part of a project to model the integrated spectra and colors of elliptical galaxies through evolutionary synthesis, we have refined our synthetic spectrum calculations of M giants. After critically assessing three effective temperature scales for M giants, we adopted the relation of Dyck et al. for our models. Using empirical spectra of field M giants as a guide, we then calculated MARCS stellar atmosphere models (Gustafsson et al. 1975; Bell et al. 1976) and SSG synthetic spectra (Bell & Gustafsson 1978; Gustafsson & Bell 1979) of these cool stars, adjusting the band absorption oscillator strengths of the TiO bands to better reproduce the observational data. The resulting synthetic spectra are found to be in very good agreement with the K-band spectra of stars of the appropriate spectral type taken from Kleinmann & Hall (1986) as well. Spectral types estimated from the strengths of the TiO bands and the depth of the band head of CO near 2.3 {mu}m quantitatively confirm that the synthetic spectra are good representations of those of field M giants. The broadband colors of the models match the field relations of K and early-M giants very well; for late-M giants, differences between the field star and synthetic colors are probably caused by the omission of spectral lines of VO and H_2_O in the spectrum synthesis calculations. Here, we present four grids of K-band bolometric corrections and colors - Johnson U-V and B-V, Cousins V-R and V-I, Johnson-Glass V-K, J-K, and H-K, and CIT/CTIO V-K, J-K, H-K, and CO - for models having 3000 K {<=} Teff {<=} 4000 K and -0.5 {<=} log(g) {<=} 1.5.2000AJ....119.1424Hhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/119/1424CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/AJ/119/1448 : Improved properties for cool stars (Houdashelt+, 2000)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/119/1424https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/119/1424http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/119/1424https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/119/1424https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/119/1424http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/119/1424GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticalInfrareddefaultJ/AJ/119/1424/table5Calibrated color-temperature relations of M giantsTempEffective temperatureKintrecnoRecord number assigned by the VizieR team. Should Not be used for identification.intLog(g)Log of the surface gravitylog(cm.s**-2)float[Fe/H]Log of the iron to hydrogen abundance relative to solarlog(Sun)floatSpTypeSpectral classificationchar(U-B)The Johnson-Cousins U-B color (Bessel 1990PASP..102.1181B)magfloat(B-V)The Johnson-Cousins B-V color (Bessel 1990PASP..102.1181B)magfloat(V-R)The Johnson-Cousins V-R color (Bessel 1990PASP..102.1181B)magfloat(V-I)The Johnson-Cousins V-I color (Bessel 1990PASP..102.1181B)magfloat(V-K)The Johnson-Glass V-K color (Bessel & Brett 1988PASP..100.1134B)magfloat(J-K)The Johnson-Glass J-K color (Bessel & Brett 1988PASP..100.1134B)magfloat(H-K)The Johnson-Glass H-K color (Bessel & Brett 1988PASP..100.1134B)magfloat(V-K)cThe CIT-CTIO V-K colormagfloat(J-K)cThe CIT-CTIO V-K colormagfloat(H-K)cThe CIT-CTIO V-K colormagfloatCOThe CIT-CTIO CO filter magnitude without color correction (Frogel+ 1978ApJ...220...75F)magfloatBCK band bolometric correction (1)magfloat