TY - JOUR
T1 - The segue stellar parameter pipeline. III. Comparison with high-resolution spectroscopy of SDSS/SEGUE field stars
AU - Allende Prieto, Carlos
AU - Sivarani, Thirupathi
AU - Beers, Timothy C.
AU - Lee, Young Sun
AU - Koesterke, Lars
AU - Shetrone, Matthew
AU - Sneden, Christopher
AU - Lambert, David L.
AU - Wilhelm, Ronald
AU - Rockosi, Constance M.
AU - Lai, David K.
AU - Yanny, Brian
AU - Ivans, Inese I.
AU - Johnson, Jennifer A.
AU - Aoki, Wako
AU - Bailer-Jones, Coryn A.L.
AU - Fiorentin, Paola Re
PY - 2008/11/1
Y1 - 2008/11/1
N2 - 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-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.
AB - 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-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.
KW - Methods: data analysis
KW - Stars: abundances
KW - Stars: fundamental parameters
KW - Surveys
KW - Techniques: spectroscopic
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U2 - 10.1088/0004-6256/136/5/2070
DO - 10.1088/0004-6256/136/5/2070
M3 - Article
AN - SCOPUS:56449126417
SN - 0004-6256
VL - 136
SP - 2070
EP - 2082
JO - Astronomical Journal
JF - Astronomical Journal
IS - 5
ER -