J/A+A/587/A2ivo://CDS.VizieR/J/A+A/587/A2doi:10.26093/cds/vizier.35870002CDSBoeche C.Grebel E.K.2018-01-08T10:57:14Z2016-02-11T08:53:52ZCDS support team

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

cds-question@unistra.frchemical-abundancesOngoing and future massive spectroscopic surveys will collect large numbers (10^6^-10^7^) of stellar spectra that need to be analyzed. Highly automated software is needed to derive stellar parameters and chemical abundances from these spectra. We developed a new method of estimating the stellar parameters Teff, logg, [M/H], and elemental abundances. This method was implemented in a new code, SP_Ace (Stellar Parameters And Chemical abundances Estimator). This is a highly automated code suitable for analyzing the spectra of large spectroscopic surveys with low or medium spectral resolution (R=2000-20000). After the astrophysical calibration of the oscillator strengths of 4643 absorption lines covering the wavelength ranges 5212-6860{AA} and 8400-8924{AA}, we constructed a library that contains the equivalent widths (EW) of these lines for a grid of stellar parameters. The EWs of each line are fit by a polynomial function that describes the EW of the line as a function of the stellar parameters. The coefficients of these polynomial functions are stored in a library called the "GCOG library". SP_Ace, a code written in FORTRAN95, uses the GCOG library to compute the EWs of the lines, constructs models of spectra as a function of the stellar parameters and abundances, and searches for the model that minimizes the {chi}^2^ deviation when compared to the observed spectrum. The code has been tested on synthetic and real spectra for a wide range of signal-to-noise and spectral resolutions.2016A&A...587A...2Bhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/587/A2CatalogResearchIsServedByTAP VizieR generic servicerelated-toIII/251 : ELODIE library V3.1 (Prugniel+ 2007)J/A+A/420/183 : Solar neighborhood spectroscopic survey (Allende Prieto+ 2004)J/A+A/564/A133 : Gaia FGK benchmark stars: metallicity (Jofre+, 2014)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/587/A2https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/587/A2http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/587/A2https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/587/A2https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/587/A2http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/587/A2GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapdefaultJ/A+A/587/A2/tabled2Benchmark stars spectraSimbadNameSimbad column added by the CDSmeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintCatDisplay the data of Gaia FGK benchmark stars, Cat. J/A+A/564/A133, Jofre et al., 2014meta.ref.urlcharspSpectrum designation (Star name or number)meta.id;meta.maincharTeffEffective TemperatureKphys.temperature.effectiveinte_Teff? Teff confidence interval lower limitKstat.error;phys.temperature.effectiveintnullableE_Teff? Teff confidence interval upper limitKstat.error;stat.maxintnullableloggLogarithm of gravitylog(cm.s**-2)phys.gravityfloate_logg? log g confidence interval lower limitlog(cm.s**-2)stat.errorfloatnullableE_logg? log g confidence interval upper limitlog(cm.s**-2)stat.error;stat.maxfloatnullable[M/H]Metallicitylog(Sun)phys.abundfloate_[M/H]? [M/H] confidence interval lower limitlog(Sun)stat.error;phys.abundfloatnullableE_[M/H]? [M/H] confidence interval upper limitlog(Sun)stat.error;stat.maxfloatnullable[Fe/H]? Iron abundance relative to the Sunlog(Sun)phys.abundfloatnullablee_[Fe/H]? [Fe/H] confidence interval lower limitlog(Sun)stat.error;phys.abund.FefloatnullableE_[Fe/H]? [Fe/H] confidence interval upper limitlog(Sun)stat.error;stat.maxfloatnullableNFeNumber of lines used for the [Fe/H] estimationmeta.numberint[Mg/H]? Magnesium abundance relative to the Sunlog(Sun)phys.abundfloatnullablee_[Mg/H]? [Mg/H] confidence interval lower limitlog(Sun)stat.error;phys.abundfloatnullableE_[Mg/H]? [Mg/H] confidence interval upper limitlog(Sun)stat.error;stat.maxfloatnullableNMgNumber of lines used for the [Mg/H] estimationmeta.numberint[Si/H]? Silicon abundance relative to the Sunlog(Sun)phys.abundfloatnullablee_[Si/H]? [Si/H] confidence interval lower limitlog(Sun)stat.error;phys.abundfloatnullableE_[Si/H]? [Si/H] confidence interval upper limitlog(Sun)stat.error;stat.maxfloatnullableNSiNumber of lines used for the [Si/H] estimationmeta.numberint[Ca/H]? Calcium abundance relative to the Sunlog(Sun)phys.abundfloatnullablee_[Ca/H]? [Ca/H] confidence interval lower limitlog(Sun)stat.error;phys.abundfloatnullableE_[Ca/H]? [Ca/H] confidence interval upper limitlog(Sun)stat.error;stat.maxfloatnullableNCaNumber of lines used for the [Ca/H] estimationmeta.numberint[Sc/H]? Scandium abundance relative to the Sunlog(Sun)phys.abundfloatnullablee_[Sc/H]? [Sc/H] confidence interval lower limitlog(Sun)stat.error;phys.abundfloatnullableE_[Sc/H]? [Sc/H] confidence interval upper limitlog(Sun)stat.error;stat.maxfloatnullableNScNumber of lines used for the [Sc/H] estimationmeta.numberint[Ti/H]? Titanum abundance relative to the Sunlog(Sun)phys.abundfloatnullablee_[Ti/H]? [Ti/H] confidence interval lower limitlog(Sun)stat.error;phys.abundfloatnullableE_[Ti/H]? [Ti/H] confidence interval upper limitlog(Sun)stat.error;stat.maxfloatnullableNTiNumber of lines used for the [Ti/H] estimationmeta.numberint[V/H]? Vanadium abundance relative to the Sunlog(Sun)phys.abundfloatnullablee_[V/H]? [V/H] confidence interval lower limitlog(Sun)stat.error;phys.abundfloatnullableE_[V/H]? [V/H] confidence interval upper limitlog(Sun)stat.error;stat.maxfloatnullableNVNumber of lines used for the [V/H] estimationmeta.numberint[Cr/H]? Chromium abundance relative to the Sunlog(Sun)phys.abundfloatnullablee_[Cr/H]? [Cr/H] confidence interval lower limitlog(Sun)stat.error;phys.abundfloatnullableE_[Cr/H]? [Cr/H] confidence interval upper limitlog(Sun)stat.error;stat.maxfloatnullableNCrNumber of lines used for the [Cr/H] estimationmeta.numberint[Co/H]? Cobalt abundance relative to the Sunlog(Sun)phys.abundfloatnullablee_[Co/H]? [Co/H] confidence interval lower limitlog(Sun)stat.error;phys.abundfloatnullableE_[Co/H]? [Co/H] confidence interval upper limitlog(Sun)stat.error;stat.maxfloatnullableNCoNumber of lines used for the [Co/H] estimationmeta.numberint[Ni/H]? Nickel abundance relative to the Sunlog(Sun)phys.abundfloatnullablee_[Ni/H]? [Ni/H] confidence interval lower limitlog(Sun)stat.error;phys.abundfloatnullableE_[Ni/H]? [Ni/H] confidence interval upper limitlog(Sun)stat.error;stat.maxfloatnullableNNiNumber of lines used for the [Ni/H] estimationmeta.numberintJ/A+A/587/A2/tabled3S4N stars spectraSimbadNameSimbad column added by the CDSmeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintCatDisplay the data of S4N, Cat. J/A+A/420/183, Allende Prieto et al., 2004meta.ref.urlcharspSpectrum designation (Star name or number)meta.id;meta.maincharTeffEffective TemperatureKphys.temperature.effectiveinte_Teff? Teff confidence interval lower limitKstat.error;phys.temperature.effectiveintnullableE_Teff? Teff confidence interval upper limitKstat.error;stat.maxintnullableloggLogarithm of gravitylog(cm.s**-2)phys.gravityfloate_logg? log g confidence interval lower limitlog(cm.s**-2)stat.errorfloatnullableE_logg? log g confidence interval upper limitlog(cm.s**-2)stat.error;stat.maxfloatnullable[M/H]Metallicitylog(Sun)phys.abundfloate_[M/H]? [M/H] confidence interval lower limitlog(Sun)stat.error;phys.abundfloatnullableE_[M/H]? [M/H] confidence interval upper limitlog(Sun)stat.error;stat.maxfloatnullable[Fe/H]? Iron abundance relative to the Sunlog(Sun)phys.abundfloatnullablee_[Fe/H]? [Fe/H] confidence interval lower limitlog(Sun)stat.error;phys.abund.FefloatnullableE_[Fe/H]? [Fe/H] confidence interval upper limitlog(Sun)stat.error;stat.maxfloatnullableNFeNumber of lines used for the [Fe/H] estimationmeta.numberint[Mg/H]? Magnesium abundance relative to the Sunlog(Sun)phys.abundfloatnullablee_[Mg/H]? [Mg/H] confidence interval lower limitlog(Sun)stat.error;phys.abundfloatnullableE_[Mg/H]? [Mg/H] confidence interval upper limitlog(Sun)stat.error;stat.maxfloatnullableNMgNumber of lines used for the [Mg/H] estimationmeta.numberint[Si/H]? Silicon abundance relative to the Sunlog(Sun)phys.abundfloatnullablee_[Si/H]? [Si/H] confidence interval lower limitlog(Sun)stat.error;phys.abundfloatnullableE_[Si/H]? [Si/H] confidence interval upper limitlog(Sun)stat.error;stat.maxfloatnullableNSiNumber of lines used for the [Si/H] estimationmeta.numberint[Ca/H]? Calcium abundance relative to the Sunlog(Sun)phys.abundfloatnullablee_[Ca/H]? [Ca/H] confidence interval lower limitlog(Sun)stat.error;phys.abundfloatnullableE_[Ca/H]? [Ca/H] confidence interval upper limitlog(Sun)stat.error;stat.maxfloatnullableNCaNumber of lines used for the [Ca/H] estimationmeta.numberint[Sc/H]? Scandium abundance relative to the Sunlog(Sun)phys.abundfloatnullablee_[Sc/H]? [Sc/H] confidence interval lower limitlog(Sun)stat.error;phys.abundfloatnullableE_[Sc/H]? [Sc/H] confidence interval upper limitlog(Sun)stat.error;stat.maxfloatnullableNScNumber of lines used for the [Sc/H] estimationmeta.numberint[Ti/H]? Titanum abundance relative to the Sunlog(Sun)phys.abundfloatnullablee_[Ti/H]? [Ti/H] confidence interval lower limitlog(Sun)stat.error;phys.abundfloatnullableE_[Ti/H]? [Ti/H] confidence interval upper limitlog(Sun)stat.error;stat.maxfloatnullableNTiNumber of lines used for the [Ti/H] estimationmeta.numberint[V/H]? Vanadium abundance relative to the Sunlog(Sun)phys.abundfloatnullablee_[V/H]? [V/H] confidence interval lower limitlog(Sun)stat.error;phys.abundfloatnullableE_[V/H]? [V/H] confidence interval upper limitlog(Sun)stat.error;stat.maxfloatnullableNVNumber of lines used for the [V/H] estimationmeta.numberint[Cr/H]? Chromium abundance relative to the Sunlog(Sun)phys.abundfloatnullablee_[Cr/H]? [Cr/H] confidence interval lower limitlog(Sun)stat.error;phys.abundfloatnullableE_[Cr/H]? [Cr/H] confidence interval upper limitlog(Sun)stat.error;stat.maxfloatnullableNCrNumber of lines used for the [Cr/H] estimationmeta.numberint[Co/H]? Cobalt abundance relative to the Sunlog(Sun)phys.abundfloatnullablee_[Co/H]? [Co/H] confidence interval lower limitlog(Sun)stat.error;phys.abundfloatnullableE_[Co/H]? [Co/H] confidence interval upper limitlog(Sun)stat.error;stat.maxfloatnullableNCoNumber of lines used for the [Co/H] estimationmeta.numberint[Ni/H]? Nickel abundance relative to the Sunlog(Sun)phys.abundfloatnullablee_[Ni/H]? [Ni/H] confidence interval lower limitlog(Sun)stat.error;phys.abundfloatnullableE_[Ni/H]? [Ni/H] confidence interval upper limitlog(Sun)stat.error;stat.maxfloatnullableNNiNumber of lines used for the [Ni/H] estimationmeta.numberintJ/A+A/587/A2/tabled1ELODIE spectral librarySimbadNameSimbad column added by the CDSmeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintCatDisplay the data of ELODIE library V3.1, Cat. III/251, Prugniel et al., 2007meta.ref.urlcharspSpectrum designation (Star name or number)meta.id;meta.maincharTeffEffective TemperatureKphys.temperature.effectiveinte_Teff? Teff confidence interval lower limitKstat.error;phys.temperature.effectiveintnullableE_Teff? Teff confidence interval upper limitKstat.error;stat.maxintnullableloggLogarithm of gravitylog(cm.s**-2)phys.gravityfloate_logg? log g confidence interval lower limitlog(cm.s**-2)stat.errorfloatnullableE_logg? log g confidence interval upper limitlog(cm.s**-2)stat.error;stat.maxfloatnullable[M/H]Metallicitylog(Sun)phys.abundfloate_[M/H]? [M/H] confidence interval lower limitlog(Sun)stat.error;phys.abundfloatnullableE_[M/H]? [M/H] confidence interval upper limitlog(Sun)stat.error;stat.maxfloatnullable[Fe/H]? Iron abundance relative to the Sunlog(Sun)phys.abundfloatnullablee_[Fe/H]? [Fe/H] confidence interval lower limitlog(Sun)stat.error;phys.abund.FefloatnullableE_[Fe/H]? [Fe/H] confidence interval upper limitlog(Sun)stat.error;stat.maxfloatnullableNFeNumber of lines used for the [Fe/H] estimationmeta.numberint[Mg/H]? Magnesium abundance relative to the Sunlog(Sun)phys.abundfloatnullablee_[Mg/H]? [Mg/H] confidence interval lower limitlog(Sun)stat.error;phys.abundfloatnullableE_[Mg/H]? [Mg/H] confidence interval upper limitlog(Sun)stat.error;stat.maxfloatnullableNMgNumber of lines used for the [Mg/H] estimationmeta.numberint[Si/H]? Silicon abundance relative to the Sunlog(Sun)phys.abundfloatnullablee_[Si/H]? [Si/H] confidence interval lower limitlog(Sun)stat.error;phys.abundfloatnullableE_[Si/H]? [Si/H] confidence interval upper limitlog(Sun)stat.error;stat.maxfloatnullableNSiNumber of lines used for the [Si/H] estimationmeta.numberint[Ca/H]? Calcium abundance relative to the Sunlog(Sun)phys.abundfloatnullablee_[Ca/H]? [Ca/H] confidence interval lower limitlog(Sun)stat.error;phys.abundfloatnullableE_[Ca/H]? [Ca/H] confidence interval upper limitlog(Sun)stat.error;stat.maxfloatnullableNCaNumber of lines used for the [Ca/H] estimationmeta.numberint[Sc/H]? Scandium abundance relative to the Sunlog(Sun)phys.abundfloatnullablee_[Sc/H]? [Sc/H] confidence interval lower limitlog(Sun)stat.error;phys.abundfloatnullableE_[Sc/H]? [Sc/H] confidence interval upper limitlog(Sun)stat.error;stat.maxfloatnullableNScNumber of lines used for the [Sc/H] estimationmeta.numberint[Ti/H]? Titanum abundance relative to the Sunlog(Sun)phys.abundfloatnullablee_[Ti/H]? [Ti/H] confidence interval lower limitlog(Sun)stat.error;phys.abundfloatnullableE_[Ti/H]? [Ti/H] confidence interval upper limitlog(Sun)stat.error;stat.maxfloatnullableNTiNumber of lines used for the [Ti/H] estimationmeta.numberint[V/H]? Vanadium abundance relative to the Sunlog(Sun)phys.abundfloatnullablee_[V/H]? [V/H] confidence interval lower limitlog(Sun)stat.error;phys.abundfloatnullableE_[V/H]? [V/H] confidence interval upper limitlog(Sun)stat.error;stat.maxfloatnullableNVNumber of lines used for the [V/H] estimationmeta.numberint[Cr/H]? Chromium abundance relative to the Sunlog(Sun)phys.abundfloatnullablee_[Cr/H]? [Cr/H] confidence interval lower limitlog(Sun)stat.error;phys.abundfloatnullableE_[Cr/H]? [Cr/H] confidence interval upper limitlog(Sun)stat.error;stat.maxfloatnullableNCrNumber of lines used for the [Cr/H] estimationmeta.numberint[Co/H]? Cobalt abundance relative to the Sunlog(Sun)phys.abundfloatnullablee_[Co/H]? [Co/H] confidence interval lower limitlog(Sun)stat.error;phys.abundfloatnullableE_[Co/H]? [Co/H] confidence interval upper limitlog(Sun)stat.error;stat.maxfloatnullableNCoNumber of lines used for the [Co/H] estimationmeta.numberint[Ni/H]? Nickel abundance relative to the Sunlog(Sun)phys.abundfloatnullablee_[Ni/H]? [Ni/H] confidence interval lower limitlog(Sun)stat.error;phys.abundfloatnullableE_[Ni/H]? [Ni/H] confidence interval upper limitlog(Sun)stat.error;stat.maxfloatnullableNNiNumber of lines used for the [Ni/H] estimationmeta.numberint