Magnetic Activity of F-, G-, and K-type Stars in the LAMOST–Kepler Field

doi:10.3847/1538-4365/ab6165

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	Magnetic Activity of F-, G-, and K-type Stars in the LAMOST–Kepler Field
	Zhang,Jinghua 8; Bi,Shaolan 8; Li,Yaguang 8; Jiang,Jie 7; Li,Tanda 6,9; He,Han 1; Yu,Jie 2; Khanna,Shourya 6; Ge,Zhishuai 3; Liu,Kang 8
刊名	The Astrophysical Journal Supplement Series
	2020-02-20
卷号	247 期号:1
关键词	Stellar activity Stellar atmospheres Stellar chromospheres Stellar magnetic fields
ISSN号	0067-0049
DOI	10.3847/1538-4365/ab6165
英文摘要	Abstract Monitoring chromospheric and photospheric indexes of magnetic activity can provide valuable information, especially the interaction between different parts of the atmosphere and their response to magnetic fields. We extract chromospheric indexes, S and , for 59,816 stars from LAMOST spectra in the LAMOST–Kepler program, and photospheric index, Reff, for 5575 stars from Kepler light curves. The log Reff shows positive correlation with log . We estimate the power-law indexes between Reff and for F-, G-, and K-type stars, respectively. We also confirm the dependence of both chromospheric and photospheric activity on stellar rotation. Ca ii H and K emissions and photospheric variations generally decrease with increasing rotation periods for stars with rotation periods exceeding a few days. The power-law indexes in exponential decay regimes show different characteristics in the two activity–rotation relations. The updated largest sample including the activity proxies and reported rotation periods provides more information to understand the magnetic activity for cool stars.
语种	英语
出版者	The American Astronomical Society
WOS记录号	IOP:0067-0049-247-1-AB6165
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/53989]
专题	中国科学院国家天文台
作者单位	1.CAS Key Laboratory of Solar Activity, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, People’s Republic of China 2.Max Planck Institute for Solar System Research, D-37077 G?ttingen, Germany 3.Key Laboratory of Beam Technology of Ministry of Education, Beijing Radiation Center, Beijing 100875, People’s Republic of China 4.School of Physics and Astronomy, Yunnan University, Kunming 650091, People’s Republic of China 5.Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, People’s Republic of China 6.Sydney Institute for Astronomy (SIfA), School of Physics, University of Sydney, Sydney, NSW 2006, Australia 7.School of Space and Environment, Beihang University, Beijing 100083, People’s Republic of China 8.Department of Astronomy, Beijing Normal University, Beijing 100875, People’s Republic of China; zhangjinghua@mail.bnu.edu.cn, bisl@bnu.edu.cn 9.Stellar Astrophysics Centre, Department of Physics and Astronomy, Aarhus University, Ny Munkegade 120, DK-8000 Aarhus C, Denmark
推荐引用方式 GB/T 7714	Zhang,Jinghua,Bi,Shaolan,Li,Yaguang,et al. Magnetic Activity of F-, G-, and K-type Stars in the LAMOST–Kepler Field[J]. The Astrophysical Journal Supplement Series,2020,247(1).
APA	Zhang,Jinghua.,Bi,Shaolan.,Li,Yaguang.,Jiang,Jie.,Li,Tanda.,...&Zhang,Xianfei.(2020).Magnetic Activity of F-, G-, and K-type Stars in the LAMOST–Kepler Field.The Astrophysical Journal Supplement Series,247(1).
MLA	Zhang,Jinghua,et al."Magnetic Activity of F-, G-, and K-type Stars in the LAMOST–Kepler Field".The Astrophysical Journal Supplement Series 247.1(2020).