J/ApJ/601/485ivo://CDS.VizieR/J/ApJ/601/485doi:10.26093/cds/vizier.16010485CDSFranchini M.Morossi C.Di Marcantonio P.Malagnini M.L.Chavez M.,Rodriguez-Merino L.2004-12-18T21:39:02Z2004-12-18T22:38:06ZCDS support team

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

cds-question@unistra.frlate-type-starschemical-abundancesSynthetic Lick indices computed with solar scaled abundances and with {alpha}-element enhancement are presented and compared with predictions from both theoretical computations (Tripicco & Bell (1995AJ....110.3035T); Thomas, Maraston, & Bender (2003MNRAS.339..897T); Barbuy et al., 2003, Cat. <J/A+A/404/661>) and empirical fitting functions (de Freitas Pacheco, 1996MNRAS.278..841D). We propose selected combinations of indices capable of singling out {alpha}-enhanced stars without requiring previous knowledge of their main atmospheric parameters. By applying this approach to the 460 stars in the Worthey et al. (1994, Cat. <J/ApJS/94/687>) catalog, we detected a list of 82 candidate {alpha}-enhanced stars. The confirmation of {alpha}-enhancement was obtained by searching the literature for individual element abundance determinations from high-resolution spectroscopy for a subsample of 34 stars. Preliminary discussion of the properties of the detected {alpha}-enhanced stars with respect to their [Fe/H] values and kinematics is presented.2004ApJ...601..485Fhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/601/485CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/ApJS/94/687 : Old stellar populations. V. (Worthey+, 1994)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/601/485https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/601/485http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/601/485https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/601/485https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/601/485http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/601/485GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/ApJ/601/485/table1aThe {alpha} enhanced candidate stars from the four panels of Figure 8 (Ca4227)HD? HD numberintnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.intm_HDMultiplicity index on HDcharOID1First other identifiercharOID2Second other identifiercharCa4227The Lick Ca4227 index in Angstroms0.1nmfloatNaDThe Lick NaD index in Angstroms0.1nmfloatdaDimensionless distance (G1)float[Fe/H]? Log of the iron to hydrogen abundancelog(Sun)floatnullableJ/ApJ/601/485/table1bThe {alpha} enhanced candidate stars from the four panels of Figure 8 (Mg2)recnoRecord number assigned by the VizieR team. Should Not be used for identification.intHD? HD numberintnullablem_HDMultiplicity index on HDcharOID1First other identifiercharOID2Second other identifiercharMg2The Lick Mg2 index in Angstroms0.1nmfloatNaDThe Lick NaD index in Angstroms0.1nmfloatdbDimensionless distance (G1)float[Fe/H]? Log of the iron to hydrogen abundancelog(Sun)floatnullableJ/ApJ/601/485/table1cThe {alpha} enhanced candidate stars from the four panels of Figure 8 (Mgb)recnoRecord number assigned by the VizieR team. Should Not be used for identification.intHD? HD numberintnullablem_HDMultiplicity index on HDcharOID1First other identifiercharOID2Second other identifiercharMgbThe Lick Mgb index in Angstroms0.1nmfloatNaDThe Lick NaD index in Angstroms0.1nmfloatdcDimensionless distance (G1)float[Fe/H]? Log of the iron to hydrogen abundancelog(Sun)floatnullableJ/ApJ/601/485/table1dThe {alpha} enhanced candidate stars from the four panels of Figure 8 (CaMg)recnoRecord number assigned by the VizieR team. Should Not be used for identification.intHD? HD numberintnullablem_HDMultiplicity index on HDcharOID1First other identifiercharOID2Second other identifiercharCaMgThe Lick CaMg index in Angstroms0.1nmfloatNaDThe Lick NaD index in Angstroms0.1nmfloatddDimensionless distance (G1)float[Fe/H]? Log of the iron to hydrogen abundancelog(Sun)floatnullableJ/ApJ/601/485/table2{alpha}-Enhanced Candidate Stars Discussed in the TextrecnoRecord number assigned by the VizieR team. Should Not be used for identification.intHDHD numberintm_HDMultiplicity index on HDchar[Fe/H]MetallicityfloatNaDNaD index0.1nmfloatCa4227? Ca4227 index0.1nmfloatnullableda? Distance of the corresponding point from the boundary line of NaD-Ca4227 diagram (1)floatnullableMg2? Mg2 Index0.1nmfloatnullabledb? Distance of the corresponding point from the boundary line of NaD-Mg2 diagram (1)floatnullableMgb? Mgb index0.1nmfloatnullabledc? Distance of the corresponding point from the boundary line of NaD-Mgb diagram (1)floatnullableCaMg? CaMg index0.1nmfloatnullabledd? Distance of the corresponding point from the boundary line of NaD-CaMg diagram (1)floatnullable