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THE SEGUE STELLAR PARAMETER PIPELINE. III. COMPARISON WITH HIGH-RESOLUTION SPECTROSCOPY OF SDSS/SEGUE FIELD STARS

Carlos Allende Prieto, Thirupathi Sivarani, Timothy C. Beers, Young Sun Lee, Lars Koesterke, Matthew Shetrone, Christopher Sneden, David L. Lambert, Ronald Wilhelm, Constance M. Rockosi, David K. Lai, Brian Yanny (+5 others)
2008 Astronomical Journal  

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2007 pre-print
arXiv:0710.5780v1 fatcat:xwgk5yb4hrgphcmxjk2dvl33lq
We report high-resolution spectroscopy of 125 field stars previously observed as part of the Sloan Digital Sky Survey and its program for Galactic studies, the Sloan Extension for Galactic Understanding and Exploration (SEGUE). These spectra are used to measure radial velocities and to derive atmospheric parameters, which we compare with those reported by the SEGUE Stellar Parameter Pipeline (SSPP). The SSPP obtains estimates of these quantities based on SDSS ugriz photometry and low-resolution
more » ... (R = 2000) spectroscopy. For F- and G-type stars observed with high signal-to-noise ratios (S/N), we empirically determine the typical random uncertainties in the radial velocities, effective temperatures, surface gravities, and metallicities delivered by the SSPP to be 2.4 km/s, 130 K (2.2%), 0.21 dex, and 0.11 dex, respectively, with systematic uncertainties of a similar magnitude in the effective temperatures and metallicities. We estimate random errors for lower S/N spectra based on numerical simulations.
doi:10.1088/0004-6256/136/5/2070 fatcat:zqkrk2pgqzbfzpfssbrzx2pndy
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Citation

Carlos Allende Prieto, Thirupathi Sivarani, Timothy C. Beers, Young Sun Lee, Lars Koesterke, Matthew Shetrone, Christopher Sneden, David L. Lambert, Ronald Wilhelm, Constance M. Rockosi, David K. Lai, Brian Yanny, Inese I. Ivans, Jennifer A. Johnson, Wako Aoki, Coryn A. L. Bailer-Jones, Paola Re Fiorentin. "THE SEGUE STELLAR PARAMETER PIPELINE. III. COMPARISON WITH HIGH-RESOLUTION SPECTROSCOPY OF SDSS/SEGUE FIELD STARS." Astronomical Journal 136.5 (2008) 2070-2082