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Stellar X-Ray Activity Across the Hertzsprung–Russell Diagram. I. Catalogs
Wang,Song1; Bai,Yu1; He,Lin2; Liu,Jifeng1,3,4
2020-10-01
Source PublicationThe Astrophysical Journal
ISSN0004-637X
Volume902Issue:2
AbstractAbstract Stellar magnetic activity provides substantial information on the magnetic dynamo and the coronal heating process. We present a catalog of X-ray activity for about 6000 stars, based on the Chandra and Gaia DR2 data. We also classified more than 3000 stars as young stellar objects, dwarf stars, or giant stars. By using the stars with valid stellar parameters and classifications, we studied the distribution of X-ray luminosity (LX) and the ratio of X-ray-to-bolometric luminosities (RX), the positive relation between LX, RX, and hardness ratio, and the long-term X-ray variation. This catalog can be used to investigate some important scientific topics, including the activity–rotation relation, the comparison between different activity indicators, and the activities of interesting objects (e.g., A-type stars and giants). As an example, we use the catalog to study the activity–rotation relation, and find that the young stellar objects, dwarfs, and giants fall on a single sequence in the relation RX versus Rossby number, while the giants do not follow the relation RX versus valid for dwarfs.
KeywordLate-type stars Stellar activity X-ray stars Young stellar objects Giant stars
DOI10.3847/1538-4357/abb66d
Language英语
WOS IDIOP:0004-637X-902-2-abb66d
PublisherThe American Astronomical Society
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Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/62134
Collection中国科学院国家天文台
Corresponding AuthorWang,Song
Affiliation1.Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, People's Republic of China songw@bao.ac.cn
2.Hebei University of Science and Technology, Shijiazhuang 050018, People's Republic of China
3.College of Astronomy and Space Sciences, University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
4.WHU-NAOC Joint Center for Astronomy, Wuhan University, Wuhan, Hubei 430072, People's Republic of China
First Author AffilicationNational Astronomical Observatories, Chinese Academy of Sciences
Corresponding Author AffilicationNational Astronomical Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Wang,Song,Bai,Yu,He,Lin,等. Stellar X-Ray Activity Across the Hertzsprung–Russell Diagram. I. Catalogs[J]. The Astrophysical Journal,2020,902(2).
APA Wang,Song,Bai,Yu,He,Lin,&Liu,Jifeng.(2020).Stellar X-Ray Activity Across the Hertzsprung–Russell Diagram. I. Catalogs.The Astrophysical Journal,902(2).
MLA Wang,Song,et al."Stellar X-Ray Activity Across the Hertzsprung–Russell Diagram. I. Catalogs".The Astrophysical Journal 902.2(2020).
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