Stellar X-Ray Activity Across the Hertzsprung–Russell Diagram. I. Catalogs
文献类型：期刊论文
| 作者 | Wang,Song2 ; Bai,Yu2; He,Lin3; Liu,Jifeng1,2,4
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| 刊名 | The Astrophysical Journal
 |
| 出版日期 | 2020-10-01 |
| 卷号 | 902期号:2 |
| 关键词 | Late-type stars Stellar activity X-ray stars Young stellar objects Giant stars |
| ISSN号 | 0004-637X |
| DOI | 10.3847/1538-4357/abb66d |
| 英文摘要 | Abstract 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. |
| 语种 | 英语 |
| WOS记录号 | IOP:0004-637X-902-2-ABB66D |
| 出版者 | The American Astronomical Society |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/62133]  |
| 专题 | 中国科学院国家天文台 |
| 通讯作者 | Wang,Song |
| 作者单位 | 1.WHU-NAOC Joint Center for Astronomy, Wuhan University, Wuhan, Hubei 430072, People's Republic of China 2.Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, People's Republic of China songw@bao.ac.cn 3.Hebei University of Science and Technology, Shijiazhuang 050018, People's Republic of China 4.College of Astronomy and Space Sciences, University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China |
| 推荐引用方式 GB/T 7714 | Wang,Song,Bai,Yu,He,Lin,et al. 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). |
入库方式： OAI收割
来源：国家天文台
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