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CALIBRATION OF LAMOST STELLAR SURFACE GRAVITIES USING THE KEPLER ASTEROSEISMIC DATA
Wang,Liang1,2; Wang,Wei1,3; Wu,Yue1; Zhao,Gang1; Li,Yinbi1; Luo,Ali1; Liu,Chao1; Zhang,Yong4; Hou,Yonghui4; Wang,Yuefei4; Cao,Zihuang1
2016-06-14
Source PublicationThe Astronomical Journal
ISSN0004-6256
Volume152Issue:1
AbstractABSTRACT Asteroseismology is a powerful tool to precisely determine the evolutionary status and fundamental properties of stars. With the unprecedented precision and nearly continuous photometric data acquired by the NASA Kepler mission, parameters of more than 104 stars have been determined nearly consistently. However, most studies still use photometric effective temperatures (Teff) and metallicities ([Fe/H]) as inputs, which are not sufficiently accurate as suggested by previous studies. We adopted the spectroscopic Teff and [Fe/H] values based on the Large sky Area Multi-Object fiber Spectroscopic Telescope (LAMOST) low-resolution spectra (R ? 1800), and combined them with the global oscillation parameters to derive the physical parameters of a large sample of stars. Clear trends were found between and spectroscopic Teff as well as log g, which may result in an overestimation of up to 0.5 dex for the log g values of giants in the LAMOST catalog. We established empirical calibration relations for the log g values of dwarfs and giants. These results can be used for determining the precise distances to these stars based on their spectroscopic parameters.
Keywordasteroseismology stars: fundamental parameters techniques: spectroscopic
DOI10.3847/0004-6256/152/1/6
Language英语
WOS IDIOP:0004-6256-152-1-6
PublisherThe American Astronomical Society
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Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/36280
Collection中国科学院国家天文台
Affiliation1.Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences, A20, Datun Road, Chaoyang District, Beijing 100012, China; lwang@nao.cas.cn, wangwei@nao.cas.cn, gzhao@nao.cas.cn
2.Max-Planck-Institut für Extraterrestrische Physik, Giessenbachstrasse, D-85748 Garching, Germany
3.Chinese Academy of Sciences South America Center for Astronomy, Camino El Observatorio 1515, Las Condes, Santiago, Chile
4.Nanjing Institute of Astronomical Optics & Technology, National Astronomical Observatories, Chinese Academy of Sciences, Nanjing 210042, China
First Author AffilicationNational Astronomical Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Wang,Liang,Wang,Wei,Wu,Yue,et al. CALIBRATION OF LAMOST STELLAR SURFACE GRAVITIES USING THE KEPLER ASTEROSEISMIC DATA[J]. The Astronomical Journal,2016,152(1).
APA Wang,Liang.,Wang,Wei.,Wu,Yue.,Zhao,Gang.,Li,Yinbi.,...&Cao,Zihuang.(2016).CALIBRATION OF LAMOST STELLAR SURFACE GRAVITIES USING THE KEPLER ASTEROSEISMIC DATA.The Astronomical Journal,152(1).
MLA Wang,Liang,et al."CALIBRATION OF LAMOST STELLAR SURFACE GRAVITIES USING THE KEPLER ASTEROSEISMIC DATA".The Astronomical Journal 152.1(2016).
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