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MAGNETIC CVs AS A BRIGHT REPRESENTATIVE OF CLOSE BINARIES
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
会议录名称Publications of the Korean Astronomical Society
2015-09
卷号30
期号2
页码175-178
DOI10.5303/PKAS.2015.30.2.175
产权排序第1完成单位
收录类别其他
会议名称12th Asia-Pacific Regional IAU Meeting
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
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).
语种英语
学科领域天文学
出版者The Korean Astronomical Society
出版地Korea
ISSN号1225-1534
URL查看原文
归档日期2016-04-12
引用统计
文献类型会议论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/9775
专题双星与变星研究组
中国科学院天体结构与演化重点实验室
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
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Qian SB,Han ZT,Zhu LY,et al. MAGNETIC CVs AS A BRIGHT REPRESENTATIVE OF CLOSE BINARIES[C]. Korea:The Korean Astronomical Society,2015:175-178.
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