Mass and age of red giant branch stars observed with LAMOST and Kepler

doi:10.1093/mnras/stx3296

CORC > 国家天文台 > 中国科学院国家天文台

	Mass and age of red giant branch stars observed with LAMOST and Kepler
	Wu, Yaqian 1; Xiang, Maosheng 2; Bi, Shaolan 1; Liu, Xiaowei 3; Yu, Jie 4,5; Hon, Marc 6; Sharma, Sanjib 4; Li, Tanda 2,4,5; Huang, Yang ; Liu, Kang 1
刊名	MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
	2018-04-01
卷号	475 期号:3 页码:3633-3643
关键词	asteroseismology stars: evolution stars: fundamental parameters
ISSN号	0035-8711
DOI	10.1093/mnras/stx3296
英文摘要	Obtaining accurate and precise masses and ages for large numbers of giant stars is of great importance for unraveling the assemblage history of the Galaxy. In this paper, we estimate masses and ages of 6940 red giant branch (RGB) stars with asteroseismic parameters deduced from Kepler photometry and stellar atmospheric parameters derived from LAMOST spectra. The typical uncertainties of mass is a few per cent, and that of age is similar to 20 per cent. The sample stars reveal two separate sequences in the age-[alpha/Fe] relation - a high-alpha sequence with stars older than similar to 8 Gyr and a low-alpha sequence composed of stars with ages ranging from younger than 1 Gyr to older than 11 Gyr. We further investigate the feasibility of deducing ages and masses directly from LAMOST spectra with a machine learning method based on kernel based principal component analysis, taking a sub-sample of these RGB stars as a training data set. We demonstrate that ages thus derived achieve an accuracy of similar to 24 per cent. We also explored the feasibility of estimating ages and masses based on the spectroscopically measured carbon and nitrogen abundances. The results are quite satisfactory and significantly improved compared to the previous studies.
资助项目	National Natural Science Foundation of China (NSFC)[U1631236] ; Chinese Academy of Sciences (CAS)[U1631236] ; National Natural Science Foundation of China[11273007] ; National Natural Science Foundation of China[10933002] ; Fundamental Research Funds for the Central Universities ; Youth Scholars Program of Beijing Normal University ; National Development and Reform Commission
WOS关键词	STELLAR ATMOSPHERIC PARAMETERS ; CHEMICAL EVOLUTION ; SOLAR NEIGHBORHOOD ; COMPONENT ANALYSIS ; TELESCOPE LAMOST ; K2 MISSION ; ASTEROSEISMOLOGY ; OSCILLATIONS ; ABUNDANCES ; ISOCHRONES
WOS研究方向	Astronomy & Astrophysics
语种	英语
出版者	OXFORD UNIV PRESS
WOS记录号	WOS:000427141900054
资助机构	National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences (CAS) ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; Youth Scholars Program of Beijing Normal University ; Youth Scholars Program of Beijing Normal University ; National Development and Reform Commission ; National Development and Reform Commission ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences (CAS) ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; Youth Scholars Program of Beijing Normal University ; Youth Scholars Program of Beijing Normal University ; National Development and Reform Commission ; National Development and Reform Commission ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences (CAS) ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; Youth Scholars Program of Beijing Normal University ; Youth Scholars Program of Beijing Normal University ; National Development and Reform Commission ; National Development and Reform Commission ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences (CAS) ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; Youth Scholars Program of Beijing Normal University ; Youth Scholars Program of Beijing Normal University ; National Development and Reform Commission ; National Development and Reform Commission
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/37124]
专题	中国科学院国家天文台
通讯作者	Wu, Yaqian; Xiang, Maosheng; Bi, Shaolan
作者单位	1.Beijing Normal Univ, Dept Astron, Beijing 100875, Peoples R China 2.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China 3.Peking Univ, Dept Astron, Beijing 100871, Peoples R China 4.Univ Sydney, Sch Phys, Sydney, NSW 2000, Australia 5.Aarhus Univ, Dept Phys & Astron, Stellar Astrophys Ctr, Ny Munkegade 120, DK-8000 Aarhus C, Denmark 6.Univ New South Wales, Sch Phys, Sydney, NSW 2052, Australia
推荐引用方式 GB/T 7714	Wu, Yaqian,Xiang, Maosheng,Bi, Shaolan,et al. Mass and age of red giant branch stars observed with LAMOST and Kepler[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2018,475(3):3633-3643.
APA	Wu, Yaqian.,Xiang, Maosheng.,Bi, Shaolan.,Liu, Xiaowei.,Yu, Jie.,...&Zhang, Jianwei.(2018).Mass and age of red giant branch stars observed with LAMOST and Kepler.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,475(3),3633-3643.
MLA	Wu, Yaqian,et al."Mass and age of red giant branch stars observed with LAMOST and Kepler".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 475.3(2018):3633-3643.