J/other/RAA/16.Givo://CDS.VizieR/J/other/RAA/16.G10doi:10.26093/cds/vizier/dx/bgkrbaCDSLi J.Han C.Xiang M.-S.Shi J.-R.Zhao J.-K.Liu X.-W.Zhang H.-W.,Yuan H.-B.Ci X.Zhang X.-F.Wang Y.-W.Huang Y.Zhang Y.Hou Y.-H.,Wang Y.-F.Cao Z.-H.2026-02-10T20:07:18Z2016-11-10T12:26:28ZCDS support team

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

cds-question@unistra.frspectroscopychemical-abundancesThe [{alpha}/Fe] ratios in stars are good tracers to probe the formation history of stellar populations and the chemical evolution of the Galaxy. The spectroscopic survey of LAMOST provides a good opportunity to determine [{alpha}/Fe] of millions of stars in the Galaxy. We present a method of measuring the [{alpha}/Fe] ratios from LAMOST spectra using the template-matching technique of the LSP3 pipeline. We use three test samples of stars selected from the ELODIE and MILES libraries, as well as the LEGUE survey to validate our method. Based on the test results, we conclude that our method is valid for measuring [{alpha}/Fe] from low-resolution spectra acquired by the LAMOST survey. Within the range of the stellar parameters Teff=[5000, 7500]K, logg=[1.0, 5.0]dex and [Fe/H]=[-1.5, +0.5]dex, our [{alpha}/Fe] measurements are consistent with values derived from high-resolution spectra, and the accuracy of our [{alpha}/Fe] measurements from LAMOST spectra is better than 0.1dex with spectral signal-to-noise higher than 20.2016RAA....16..110Lhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/other/RAA/16.G10CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toV/146 : LAMOST DR1 catalogs (Luo+, 2015)J/AJ/150/187 : Abundances and stellar parameters of LAMOST stars (Lee+, 2015)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/other/RAA/16.G10https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/other/RAA/16.G10http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/other/RAA/16.G10https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/other/RAA/16.G10https://vizier.iucaa.in/viz-bin/votable?-source=J/other/RAA/16.G10http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/other/RAA/16.G10GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/other/RAA/16.G10/table1 (List of the atmospheric parameters and the [alpha/Fe] values for HRS)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/other/RAA/16.G10/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/other/RAA/16.G10/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/other/RAA/16.G10/table1?GETtext/xml+votable180.050000true1.28847530.32902750.0055555555555555566/987 1186 1235 1360 1530 1687 1808 1911 1937 1940 1997 4156 4665 4762 4942 5061 5266 5522 6165 6171 6273 6298 6325-6326 6348 6699 6760 6791 6953 7115 7141 10302 10379 10400 14590 18888 19227 20331 21809 21906 21940 22205 22340 22354-22355 23030 23739 23856 23873 23887 23960 24019 24028 24436 25963 28154 28400 28437 28481 28489 28518 28549 31411https://cdsarc.cds.unistra.fr/viz-bin/moc/J/other/RAA/16.G10?format=asciiOpticaldefaultJ/other/RAA/16.G10/table1List of the atmospheric parameters and the [alpha/Fe] values for HRSrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameStar namemeta.id;meta.maincharSpecIDLAMOST spectrum IDmeta.idcharTeffHHigh-resolution effective temperatureKphys.temperature.effectiveintloggHHigh-resolution surface gravitylog(cm.s**-2)phys.gravityfloat[Fe/H]HHigh-resolution metallicityphys.abund.Fefloat[alpha/Fe]HHigh-resolution [alpha/Fe] abundancephys.abundfloatTeffLLSP3 effective temperatureKphys.temperature.effectiveintloggLLSP3 surface gravitylog(cm.s**-2)phys.gravityfloat[Fe/H]LLSP3 metallicityphys.abund.Fefloat[alpha/Fe]LLSP3 [alpha/Fe] abundancephys.abundfloatSimbadSimbad column added by the CDSmeta.ref.urlchar_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.main