Astronomy and Astrophysics – Astrophysics
Scientific paper
Jan 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21733413c&link_type=abstract
American Astronomical Society, AAS Meeting #217, #334.13; Bulletin of the American Astronomical Society, Vol. 43, 2011
Astronomy and Astrophysics
Astrophysics
Scientific paper
We have derived estimates of stellar atmospheric parameters (Teff, log g, [Fe/H]) for more than 1000 stars with medium-resolution spectra (R = 1800) observed by both SDSS/SEGUE and the LAMOST (Guoshoujing) Telescope. The spectra have been analysed by the current version of the SEGUE Stellar Parameter Pipeline (Lee et al. 2008a, Allende Prieto et al. 2008, Smolinski et al. 2010). The stars cover a wide range of parameter space, similar to that expected to be covered by the LAMOST stellar survey efforts, scheduled to begin within the next year. Despite the fact that the LAMOST 2D pipelines are still in a preliminary stage, and less than ideal wavelength calibrations, flatfielding, and flux calibrations are being used, our comparison of the derived parameters indicates that (at least for many spectra) quite reasonable agreement has been obtained between the two samples. This is an encouraging sign that the LAMOST survey spectra will eventually yield results of similar utility as the SDSS/SEGUE spectra for studies of the stellar populations of the Milky Way, but for at least an order of magnitude more stars spanning much larger, contiguous areas on the sky.
The Participants in LAMOST, US (PLUS) collaboration acknowledges funding from the U.S. National Science Foundation grant AST-0937523. TCB and YSL acknowledge partial funding of this work from grants PHY 02-16783 and PHY 08-22648: Physics Frontier Center/Joint Institute for Nuclear Astrophysics (JINA), awarded by the U.S. National Science Foundation.
(PLUS) US
Bai Zhongrui
Beers Timothy C.
Carlin Jeffrey L.
Chen Jiahua
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