MAGNETIC CVs AS A BRIGHT REPRESENTATIVE OF CLOSE BINARIES
文献类型:会议论文
作者 | Qian SB(钱声帮)1,2,3; Han ZT(韩忠涛)1,2,3; Zhu LY(朱俐颖)1,2,3; Liao WP(廖文萍)1,2; E. Fernández-Lajús4,5; M. Zejda6; Liu L(刘亮)1,2,3; B. Soonthornthum7; Zhou X(周肖)1,2,3 |
出版日期 | 2015-09 |
会议日期 | 2014-08-18 |
会议地点 | DOC, Daejeon, Korea |
关键词 | Binaries: Stars Binaries: Close-stars Binaries: Eclipsing-stars Evolution |
卷号 | 30 |
期号 | 2 |
DOI | 10.5303/PKAS.2015.30.2.175 |
页码 | 175-178 |
英文摘要 | Due to the lack of an accretion disk in a polar (magnetic cataclysmic variable, MCV), the material transferred from the secondary is directly accreted onto the white dwarf, forming an accretion stream and a hot spot on the white-dwarf component. During the eclipses, different light components can be isolated. Therefore, the monitoring of eclipsing polars could provide valuable information on several modern astrophysical problems, e.g., CVs as planetary hosting stars, mass transfer and mass accretion in CVs, and the magnetic activity of the most rapidly rotating cool dwarfs. In the past five years, we have monitored about 10 eclipsing polars (e.g., DP Leo and HU Aqr) using several 2-m class telescopes and about 100 eclipse profiles were obtained. In this paper, we will introduce the progress of our research group at YNOs. The first direct evidence of variable mass transfer in a CV is obtained and we show that it is the dark-spot activity that causes the mass transfer in CVs. Magnetic activity cycles of the cool secondary were detected and we show that the variable mass transfer is not caused by magnetic activity cycles. These results will shed light on the structure and evolution of close binary stars (e.g., CVs and Algols). |
产权排序 | 第1完成单位 |
资助机构 | Chinese Natural Science Foundation |
会议录 | Publications of the Korean Astronomical Society |
会议录出版者 | The Korean Astronomical Society |
学科主题 | 天文学 ; 天体物理学 ; 恒星与银河系 |
会议录出版地 | Korea |
语种 | 英语 |
URL标识 | 查看原文 |
资助项目 | Chinese Natural Science Foundation[11133007] ; Chinese Natural Science Foundation[11325315] |
ISSN号 | 1225-1534 |
源URL | [http://ir.ynao.ac.cn/handle/114a53/9775] |
专题 | 云南天文台_双星与变星研究组 云南天文台_中国科学院天体结构与演化重点实验室 |
通讯作者 | Qian SB(钱声帮) |
作者单位 | 1.Yunnan Observatories, Chinese Academy of Sciences (CAS), P.O. Box 110, 650011 Kunming, P.R. China 2.Key laboratory of the structure and evolution celestial bodies, Chinese Academy of Sciences, P. O. Box 110, 650011, Kunming, P. R. China 3.University of the Chinese Academy of Sciences, Yuquan Road 19#, Sijingshang Block, 100049 Beijing, P. R. China 4.Facultad de Ciencias Astronómicasy Geofísicas, Universidad Nacional de La Plata, 1900 La Plata, Buenos Aires, Argentina 5.Instituto de Astrofisica de La Plata (CCT La plata - CONICET/UNLP), Argentina 6.Department of Theoretical Physics and Astrophysics, Masaryk University, Kotl´aˇrsk´a 2, CZ-611 37 Brno, Czech Republic 7.National Astronomical Research Insititude of Thailand, 191 Siriphanich Bldg., Huay Kaew Rd., Chiang Mai 50200, Thailand |
推荐引用方式 GB/T 7714 | Qian SB,Han ZT,Zhu LY,et al. MAGNETIC CVs AS A BRIGHT REPRESENTATIVE OF CLOSE BINARIES[C]. 见:. DOC, Daejeon, Korea. 2014-08-18. |
入库方式: OAI收割
来源:云南天文台
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