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Magnetic Activity of F-, G-, and K-type Stars in the LAMOST–Kepler Field
Zhang,Jinghua1; Bi,Shaolan1; Li,Yaguang1; Jiang,Jie2; Li,Tanda3,4; He,Han5; Yu,Jie6; Khanna,Shourya3; Ge,Zhishuai7; Liu,Kang1; Tian,Zhijia8; Wu,Yaqian9; Zhang,Xianfei1
2020-02-20
Source PublicationThe Astrophysical Journal Supplement Series
ISSN0067-0049
Volume247Issue:1
AbstractAbstract 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.
KeywordStellar activity Stellar atmospheres Stellar chromospheres Stellar magnetic fields
DOI10.3847/1538-4365/ab6165
Language英语
WOS IDIOP:0067-0049-247-1-ab6165
PublisherThe American Astronomical Society
Citation statistics
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/53990
Collection中国科学院国家天文台
Affiliation1.Department of Astronomy, Beijing Normal University, Beijing 100875, People’s Republic of China; zhangjinghua@mail.bnu.edu.cn, bisl@bnu.edu.cn
2.School of Space and Environment, Beihang University, Beijing 100083, People’s Republic of China
3.Sydney Institute for Astronomy (SIfA), School of Physics, University of Sydney, Sydney, NSW 2006, Australia
4.Stellar Astrophysics Centre, Department of Physics and Astronomy, Aarhus University, Ny Munkegade 120, DK-8000 Aarhus C, Denmark
5.CAS Key Laboratory of Solar Activity, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, People’s Republic of China
6.Max Planck Institute for Solar System Research, D-37077 G?ttingen, Germany
7.Key Laboratory of Beam Technology of Ministry of Education, Beijing Radiation Center, Beijing 100875, People’s Republic of China
8.School of Physics and Astronomy, Yunnan University, Kunming 650091, People’s Republic of China
9.Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, People’s Republic of China
Recommended Citation
GB/T 7714
Zhang,Jinghua,Bi,Shaolan,Li,Yaguang,等. 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).
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