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SEGUE-2: Old Milky Way Stars Near and Far
- Title
- SEGUE-2: Old Milky Way Stars Near and Far
- Authors
- Rockosi C.M.; Sun Lee Y.; Morrison H.L.; Yanny B.; Johnson J.A.; Lucatello S.; Sobeck J.; Beers T.C.; Allende Prieto C.; An D.; Bizyaev D.; Blanton M.R.; Casagrande L.; Eisenstein D.J.; Gould A.; Gunn J.E.; Harding P.; Ivans I.I.; Jacobson H.R.; Janesh W.; Knapp G.R.; Kollmeier J.A.; Lépine S.; López-Corredoira M.; Ma Z.; Newberg H.J.; Pan K.; Prchlik J.; Sayers C.; Schlesinger K.J.; Simmerer J.; Weinberg D.H.
- Ewha Authors
- 안덕근
- SCOPUS Author ID
- 안덕근
- Issue Date
- 2022
- Journal Title
- Astrophysical Journal, Supplement Series
- ISSN
- 0067-0049
- Citation
- Astrophysical Journal, Supplement Series vol. 259, no. 2
- Publisher
- American Astronomical Society
- Indexed
- SCIE; SCOPUS
- Document Type
- Article
- Abstract
- The Sloan Extension for Galactic Understanding and Exploration 2 (SEGUE-2) obtained 128,288 low-resolution spectra (R ∼1800) of 118,958 unique stars in the first year of the Sloan Digital Sky Survey III (2008-2009). SEGUE-2 targeted prioritized distant halo tracers (blue horizontal-branch stars, K giants, and M giants) and metal-poor or kinematically hot populations. The main goal of SEGUE-2 was to target stars in the distant halo and measure their kinematics and chemical abundances to learn about the formation and evolution of the Milky Way. We present the SEGUE-2 field placement and target selection strategies. We discuss the success rate of the targeting based on the SEGUE-2 spectra and other spectroscopic and astrometric surveys. We describe the final SEGUE-2/SDSS-III improvements to the stellar parameter determinations based on the SEGUE Stellar Parameter Pipeline. We report a (g - i) color-effective temperature relation calibrated to the IRFM. We evaluate the accuracy and uncertainties associated with these stellar parameters by comparing with fundamental parameters, a sample of high-resolution spectra of SEGUE stars analyzed homogeneously, stars in well-studied clusters, and stars observed in common by the APOGEE survey. The final SEGUE spectra, calibration data, and derived parameters described here were released in SDSS-III Data Release 9 and continue to be included in all subsequent SDSS Data Releases. Because of its faint limiting magnitude and emphasis on the distant halo, the public SEGUE-2 data remain an important resource for the spectroscopy of stars in the Milky Way. © 2022. The American Astronomical Society. All rights reserved.
- DOI
- 10.3847/1538-4365/ac5323
- Appears in Collections:
- 사범대학 > 과학교육과 > Journal papers
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