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Evolution and Outbursts of Cataclysmic Variables
Qian SB(钱声帮)1,2,3; Zhu LY(朱俐颖)1,2,3; Zhao EG(赵二刚)1,2; E. Fern´andez Laj´us4,5; Zhang J(张嘉)1,2; Shi G(时光)1,2; Han ZT(韩忠涛)1,2
会议录名称Acta Polytechnica CTU Proceedings
2015
卷号2
期号1
页码152–155
DOI10.14311/APP.2015.02.0152
产权排序第1完成单位
收录类别其他
会议名称N/A
会议日期N/A
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关键词Cataclysmic Variables - Polars - Photometry - Individual: Hu Aqr Dp Leo Mn Hya And V2301 Oph
摘要

Mass transfer and accretion are very important to understand the evolution and observational properties of cataclysmic variables (CVs). Due to the lack of an accretion disk, eclipsing profiles of polars are the best source to study the character of mass transfer in CVs. By analyzing long-term photometric variations in the eclipsing polar HU Aqr, the property of mass transfer and accretion are investigated. The correlation between the brightness state change and the variation of the ingress profile suggests that both the accretion hot spot and the accretion stream are produced instantaneously. The observations clearly show that it is the variation of mass transfer causing the brightness state changes that is a direct evidence of variable mass transfer in a CV. It is shown that it is the local dark-spot activity near the L1 point to cause the change of the mass transfer rather than the activity cycles of the cool secondary star. Our results suggest that the evolution of CVs is more complex than that predicted by the standard model and we should consider the effect of variable mass accretion in nova and dwarf nova outbursts.

语种英语
学科领域天文学 ; 天体物理学 ; 恒星与银河系
学科门类理学 ; 理学::天文学
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归档日期2015-06-04
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文献类型会议论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/9662
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 Science, P. O. Box 110, 650011 Kunming, China
2.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, 650011 Kunming, China
3.University of the Chinese Academy of Sciences, Yuquan Road 19#, Sijingshang Block, 100049 Beijing, China
4.Facultad de Ciencias Astronomicas y Geofsicas, Universidad Nacional de La Plata, 1900 La Plata, Buenos Aires, Argentina
5.Instituto de Astro sica de La Plata (CCT La plata - CONICET/UNLP), Argentina
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Qian SB,Zhu LY,Zhao EG,et al. Evolution and Outbursts of Cataclysmic Variables[C],2015:152–155.
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