The SEGUE Stellar Parameter Pipeline. II. Validation with Galactic Globular and Open Clusters

Abstract

We validate the performance and accuracy of the current SEGUE (Sloan Extension for Galactic Understanding and Exploration) Stellar Parameter Pipeline (SSPP), which determines stellar atmospheric parameters (effective temperature, surface gravity, and metallicity) by comparing derived overall metallicities and radial velocities from selected likely members of three globular clusters (M 13, M 15, and M 2) and two open clusters (NGC 2420 and M 67) to the literature values. Spectroscopic and photometric data obtained during the course of the original Sloan Digital Sky Survey (SDSS-I) and its first extension (SDSS-II/SEGUE) are used to determine stellar radial velocities and atmospheric parameter estimates for stars in these clusters. Based on the scatter in the metallicities derived for the members of each cluster, we quantify the typical uncertainty of the SSPP values, sigma([Fe/H]) = 0.13 dex for stars in the range of 4500 K < Teff < 7500 K and 2.0 < log g < 5.0, at least over the metallicity interval spanned by the clusters studied (-2.3 < [Fe/H] < 0). The surface gravities and effective temperatures derived by the SSPP are also compared with those estimated from the comparison of the color-magnitude diagrams with stellar evolution models; we find satisfactory agreement. At present, the SSPP underestimates [Fe/H] for near-solar-metallicity stars, represented by members of M 67 in this study, by about 0.3 dex.

56 pages, 8 Tables, 15 figures, submitted to the Astronomical Journal

References in corpus (40)

• Maps of Dust IR Emission for Use in Estimation of Reddening and CMBR Foregrounds
• The Sloan Digital Sky Survey: Technical Summary
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• The Sloan Digital Sky Survey Photometric Camera
• The u'g'r'i'z' Standard Star Network
• The Sixth Data Release of the Sloan Digital Sky Survey
• The Second Data Release of the Sloan Digital Sky Survey
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• SDSS Data Management and Photometric Quality Assessment
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• Empirical calibration of the near-IR Ca II triplet - I. The stellar library and index definition
• A Globular Cluster Metallicity Scale Based on the Abundance of Fe II
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• The SEGUE Stellar Parameter Pipeline. III. Comparison with High-Resolution Spectroscopy of SDSS/SEGUE Field Stars
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• Abundances in a Large Sample of Stars in M3 and M13
• Elemental Abundance Ratios in Stars of the Outer Galactic Disk. I. Open Clusters
• Deep Wide-Field Spectrophotometry of the Open Cluster M67
• The Chemical Composition Contrast between M3 and M13 Revisited: New Abundances for 28 Giant Stars in M3
• Element abundances of unevolved stars in the open cluster M 67
• Metallicity and Alpha-Element Abundance Measurement in Red Giant Stars from Medium Resolution Spectra
• Estimation of stellar atmospheric parameters from SDSS/SEGUE spectra
• Empirical calibration of the near-IR Ca II triplet - II. The stellar atmospheric parameters
• C and N Abundances in Stars At the Base of the Red Giant Branch in M15
• Spectroscopy of Blue Stragglers and Turnoff Stars in M67 (NGC 2682)
• Neutron-capture elements in the metal-poor globular cluster M15
• vbyCaHbeta CCD Photometry of Clusters. VI. The Metal-Deficient Open Cluster NGC 2420
• Analysis of medium resolution spectra by automated methods - application to M55 and omega Centauri

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