VizieR Online Data Catalog: Red giant star sample from SDSS (Chen+, 2014)
Abstract
Based on the SDSS DR9 database, we selected stars with (g-r)0 color in the range of 0.1 to 1.0 mag, and log g less than 3.5 dex for each metallicity bin ranging from [Fe/H]<-3.0 to [Fe/H]=0.0 with a step of 0.2 dex, and obtained their spectra. In the selection and subsequent analysis, stellar parameters (temperature, gravity, and [Fe/H]) are based on the most recent update of the SEGUE Stellar Parameter Pipeline (SSPP; Lee et al. 2008AJ....136.2022L, 2008, J/AJ/136/2050, 2011, J/AJ/141/90; Allende Prieto et al. 2008AJ....136.2070A; Smolinski et al. 2011, J/AJ/141/89). As described in Ahn et al. (2012ApJS..203...21A), the updated SSPP adopts a much-improved color-temperature relation from the InfraRed Flux Method Casagrande et al. (2010, J/A+A/512/A54), and the estimates of surface gravity and metallicity have been thoroughly recalibrated based on results from high-resolution observations. An estimate of the internal uncertainties of the SSPP is ~50 K for Teff, ~0.12 dex for log g, and ~0.10 dex for [Fe/H]. In order to avoid early-type stars, we limit the stars to have SSPP temperatures from 3000 K to 10000 K and a signal-to-noise ratio larger than 10.
(1 data file).- Publication:
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VizieR Online Data Catalog
- Pub Date:
- May 2017
- DOI:
- 10.26093/cds/vizier.17950052
- Bibcode:
- 2017yCat..17950052C
- Keywords:
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- Milky Way;
- Stars: halo;
- Stars: giant;
- Stars: distances;
- Abundances: [Fe/H];
- Radial velocities;
- Rotational velocities