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Stellar Chromospheric Activity and Age Relation from Open Clusters in the LAMOST Survey
Zhang,Jiajun1,2; Zhao,Jingkun1; Oswalt,Terry D.3; Fang,Xiangsong4,5; Zhao,Gang1,2; Liang,Xilong1,2; Ye,Xianhao1,2; Zhong,Jing6
2019-12-10
Source PublicationThe Astrophysical Journal
ISSN0004-637X
Volume887Issue:1
AbstractAbstract We identify member stars of more than 90 open clusters in the LAMOST survey. With the method of Fang et al., the chromospheric activity (CA) indices, for 1091 member stars in 82 open clusters and for 1118 member stars in 83 open clusters, are calculated. The relations between the average , in each open cluster and its age are investigated in different Teff and [Fe/H] ranges. We find that CA starts to decrease slowly from log t?=?6.70 to log t?=?8.50, and then decreases rapidly until log t?=?9.53. The trend becomes clearer for cooler stars. The quadratic functions between log R′ and log t with 4000 K ?
KeywordStellar activity Stellar ages Open star clusters
DOI10.3847/1538-4357/ab4efe
Language英语
WOS IDIOP:0004-637X-887-1-ab4efe
PublisherThe American Astronomical Society
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Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/28665
Collection中国科学院国家天文台
Affiliation1.Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, People's Republic of China zjk@nao.cas.cn, zjk@bao.ac.cn
2.School of Astronomy and Space Science, University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
3.Embry-Riddle Aeronautical University, 600 S. Clyde Morris Boulevard, Daytona Beach, FL 32114, USA; oswaltt1@erau.edu
4.Chinese Academy of Sciences South America Center for Astronomy, National Astronomical Observatories, CAS, Beijing 100101, People's Republic of China
5.Instituto de Astronomía, Universidad Católica del Norte, Av. Angamos 0610, Antofagasta, Chile
6.Key Laboratory for Research in Galaxies and Cosmology, Shanghai Astronomical Observatory, Chinese Academy of Sciences, 80 Nandan Road, Shanghai 200030, People's Republic of China
First Author AffilicationNational Astronomical Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Zhang,Jiajun,Zhao,Jingkun,Oswalt,Terry D.,et al. Stellar Chromospheric Activity and Age Relation from Open Clusters in the LAMOST Survey[J]. The Astrophysical Journal,2019,887(1).
APA Zhang,Jiajun.,Zhao,Jingkun.,Oswalt,Terry D..,Fang,Xiangsong.,Zhao,Gang.,...&Zhong,Jing.(2019).Stellar Chromospheric Activity and Age Relation from Open Clusters in the LAMOST Survey.The Astrophysical Journal,887(1).
MLA Zhang,Jiajun,et al."Stellar Chromospheric Activity and Age Relation from Open Clusters in the LAMOST Survey".The Astrophysical Journal 887.1(2019).
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