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The segue stellar parameter pipeline. III. Comparison with high-resolution spectroscopy of SDSS/SEGUE field stars

Allende Prieto, C; Koesterke, L; Shetrone, M; Sneden, C; Lambert, DL; Sivarani, T; ... Fiorentin, PR; + view all (2008) The segue stellar parameter pipeline. III. Comparison with high-resolution spectroscopy of SDSS/SEGUE field stars. Astronomical Journal , 136 (5) 2070 - 2082. 10.1088/0004-6256/136/5/2070.

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Abstract

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 (R 2000) spectroscopy. For F- and G-type stars observed with high signal-to-noise ratios (S/Ns), 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 based on numerical simulations. © 2008. The American Astronomical Society. All rights reserved.

Type:Article
Title:The segue stellar parameter pipeline. III. Comparison with high-resolution spectroscopy of SDSS/SEGUE field stars
DOI:10.1088/0004-6256/136/5/2070
UCL classification:UCL > School of BEAMS > Faculty of Maths and Physical Sciences > Space and Climate Physics

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