Secular period decreasing of detached chromospherically active binaries
文献类型：期刊论文
| 作者 | Luo, Chang Qing1,2,3,4; Zhang, Xiao Bin4; Deng, Li Cai4; Luo, Yang Ping1,2; Luo, Zhi Quan5; Yang, Shu Zheng5 |
| 刊名 | ASTROPHYSICS AND SPACE SCIENCE
 |
| 出版日期 | 2010-05-01 |
| 卷号 | 327期号:1页码:9-17 |
| 关键词 | Detached binaries Chromospheric active binaries Period decrease Magnetic activity |
| 英文摘要 | The long-term orbital period changes of a large sample of detached chromospherically active binaries (CABs) were studied. Eleven such systems were found to be undergoing secular period decreases with the rates of -6.3 x 10(-9) to -1.1 x 10(-6) days per year. The period decreasing rates are found to vary depending on the orbital period. The longer the orbital period is, the more rapidly the period decreases. Following Stepien (Mon. Not. R. Astron. Soc. 274: 1019, 1995), the period decreasing rate predicted by angular momentum loss (AML) caused by magnetic wind is computed for each system. A comparison between the observed and calculated period decreasing rates shows that the former values are obviously larger than the latter by 1-3 orders of magnitude. It suggests that the magnetic wind is not likely the determinant mechanism driving the AML in these systems. Finally, the orbital angular momentum (AM) and the rate of AML, (J) over dot, are computed for each system. It shows that the AM have a similar change with the orbital period like dP/dt does, but log (J) over dot/J presents no strict changing with the kinematical ages. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000276204000002 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/7739]  |
| 专题 | 国家天文台_光学天文研究部 |
| 作者单位 | 1.Chinese Acad Sci, Natl Astron Observ, Yunnan Observ, Kunming 650011, Peoples R China 2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Key Lab Struct & Evolut Celestial Objects, Kunming 650011, Peoples R China 4.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China 5.China W Normal Univ, Inst Theoret Phys, Nanchong 637002, Sichuan, Peoples R China |
| 推荐引用方式 GB/T 7714 | Luo, Chang Qing,Zhang, Xiao Bin,Deng, Li Cai,et al. Secular period decreasing of detached chromospherically active binaries[J]. ASTROPHYSICS AND SPACE SCIENCE,2010,327(1):9-17. |
| APA | Luo, Chang Qing,Zhang, Xiao Bin,Deng, Li Cai,Luo, Yang Ping,Luo, Zhi Quan,&Yang, Shu Zheng.(2010).Secular period decreasing of detached chromospherically active binaries.ASTROPHYSICS AND SPACE SCIENCE,327(1),9-17. |
| MLA | Luo, Chang Qing,et al."Secular period decreasing of detached chromospherically active binaries".ASTROPHYSICS AND SPACE SCIENCE 327.1(2010):9-17. |
入库方式： OAI收割
来源：国家天文台
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