Stellar parameters from SDSS-III APOGEE DR10

DOI

The Sloan Digital Sky Survey III (SDSS-III) Apache Point Observatory Galactic Evolution Experiment (APOGEE) is a three-year survey that is collecting 10^5^ high-resolution spectra in the near-IR across multiple Galactic populations. To derive stellar parameters and chemical compositions from this massive data set, the APOGEE Stellar Parameters and Chemical Abundances Pipeline (ASPCAP) has been developed. Here, we describe empirical calibrations of stellar parameters presented in the first SDSS-III APOGEE data release (DR10). These calibrations were enabled by observations of 559 stars in 20 globular and open clusters. The cluster observations were supplemented by observations of stars in NASA's Kepler field that have well determined surface gravities from asteroseismic analysis. We discuss the accuracy and precision of the derived stellar parameters, considering especially effective temperature, surface gravity, and metallicity; we also briefly discuss the derived results for the abundances of the {alpha}-elements, carbon, and nitrogen. Overall, we find that ASPCAP achieves reasonably accurate results for temperature and metallicity, but suffers from systematic errors in surface gravity. We derive calibration relations that bring the raw ASPCAP results into better agreement with independently determined stellar parameters. The internal scatter of ASPCAP parameters within clusters suggests that metallicities are measured with a precision better than 0.1dex, effective temperatures better than 150K, and surface gravities better than 0.2dex. The understanding provided by the clusters and Kepler giants on the current accuracy and precision will be invaluable for future improvements of the pipeline.

Cone search capability for table J/AJ/146/133/table4 (Properties of stars used for validation of ASPCAP (APOGEE Stellar Parameters and Chemical Abundances Pipeline) (2015-03-12 version))

Identifier
DOI http://doi.org/10.26093/cds/vizier.51460133
Source https://dc.g-vo.org/rr/q/lp/custom/CDS.VizieR/J/AJ/146/133
Related Identifier https://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/146/133
Related Identifier http://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/146/133
Metadata Access http://dc.g-vo.org/rr/q/pmh/pubreg.xml?verb=GetRecord&metadataPrefix=oai_b2find&identifier=ivo://CDS.VizieR/J/AJ/146/133
Provenance
Creator Meszaros Sz.; Holtzman J.; Garcia Perez A.E.; Allende Prieto C.,Schiavon R.P.; Basu S.; Bizyaev D.; Chaplin W.J.; Chojnowski S.D.,Cunha K.; Elsworth Y.; Epstein C.; Frinchaboy P.M.; Garcia R.A.,Hearty F.R.; Hekker S.; Johnson J.A.; Kallinger T.; Koesterke L.,Majewski S.R.; Martell S.L.; Nidever D.; Pinsonneault M.H.; O'Connell J.,Shetrone M.; Smith V.V.; Wilson J.C.; Zasowski G.
Publisher CDS
Publication Year 2014
Rights https://cds.unistra.fr/vizier-org/licences_vizier.html
OpenAccess true
Contact CDS support team <cds-question(at)unistra.fr>
Representation
Resource Type Dataset; AstroObjects
Discipline Astrophysics and Astronomy; Interdisciplinary Astronomy; Natural Sciences; Observational Astronomy; Physics; Stellar Astronomy