TY - JOUR
T1 - The segue stellar parameter pipeline. IV. validation with an extended sample of Galactic globular and open clusters
AU - Smolinski, Jason P.
AU - Lee, Young Sun
AU - Beers, Timothy C.
AU - An, Deokkeun
AU - Bickerton, Steven J.
AU - Johnson, Jennifer A.
AU - Loomis, Craig P.
AU - Rockosi, Constance M.
AU - Sivarani, Thirupathi
AU - Yanny, Brian
PY - 2011/3
Y1 - 2011/3
N2 - Spectroscopic and photometric data for likely member stars of five Galactic globular clusters (M3, M53, M71, M92, and NGC5053) and three open clusters (M35, NGC2158, and NGC6791) are processed by the current version of the SEGUE Stellar Parameter Pipeline (SSPP), in order to determine estimates of metallicities and radial velocities (RVs) for the clusters. These results are then compared to values from the literature. We find that the mean metallicity (〈[Fe/H]〉) and mean radial velocity (〈RV〉) estimates for each cluster are almost all within 2σ of the adopted literature values; most are within 1σ. We also demonstrate that the new version of the SSPP achieves small, but noteworthy, improvements in 〈[Fe/H]〉 estimates at the extrema of the cluster metallicity range, as compared to a previous version of the pipeline software. These results provide additional confidence in the application of the SSPP for studies of the abundances and kinematics of stellar populations in the Galaxy.
AB - Spectroscopic and photometric data for likely member stars of five Galactic globular clusters (M3, M53, M71, M92, and NGC5053) and three open clusters (M35, NGC2158, and NGC6791) are processed by the current version of the SEGUE Stellar Parameter Pipeline (SSPP), in order to determine estimates of metallicities and radial velocities (RVs) for the clusters. These results are then compared to values from the literature. We find that the mean metallicity (〈[Fe/H]〉) and mean radial velocity (〈RV〉) estimates for each cluster are almost all within 2σ of the adopted literature values; most are within 1σ. We also demonstrate that the new version of the SSPP achieves small, but noteworthy, improvements in 〈[Fe/H]〉 estimates at the extrema of the cluster metallicity range, as compared to a previous version of the pipeline software. These results provide additional confidence in the application of the SSPP for studies of the abundances and kinematics of stellar populations in the Galaxy.
KW - methods: data analysis
KW - stars: abundances
KW - stars: fundamental parameters
KW - surveys
KW - techniques: spectroscopic
UR - http://www.scopus.com/inward/record.url?scp=79953063343&partnerID=8YFLogxK
U2 - 10.1088/0004-6256/141/3/89
DO - 10.1088/0004-6256/141/3/89
M3 - Article
AN - SCOPUS:79953063343
SN - 0004-6256
VL - 141
JO - Astronomical Journal
JF - Astronomical Journal
IS - 3
M1 - 89
ER -