Journal
ASTRONOMICAL JOURNAL
Volume 136, Issue 5, Pages 2070-2082Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0004-6256/136/5/2070
Keywords
methods: data analysis; stars: abundances; stars: fundamental parameters; surveys; techniques: spectroscopic
Categories
Funding
- NASA [NAG5-13057, NAG5-13147]
- U.S. National Science Foundation [AST 04-06784, AST 07-07776]
- Physics Frontier Center/Joint Institute for Nuclear Astrophysics (JINA) [PHY 02-16783]
- Welch Foundation of Houston, Texas
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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 similar to 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(-1), 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.
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