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A New Stellar Outburst Associated with the Magnetic Activities of the K-type Dwarf in a White Dwarf Binary
Qian SB(钱声帮)1,2,3,4; Han ZT(韩忠涛)1,2,3,4; Zhang B(张斌)1,2,3,4; Zejda, M.5; Michel, R.6; Zhu LY(朱俐颖)1,2,3,4; Zhao EG(赵二刚)1,2,3,4; Liao WP(廖文萍)1,2,3; Tian XM(田晓慢)1,2,3,4; Wang ZH(王志华)1,2,3,4; Qian, S. -B.(Chinese Acad Sci, Yunnan Observ, POB 110, Kunming 650011, Yunnan, Peoples R China)
发表期刊ASTROPHYSICAL JOURNAL
2017-10-20
卷号848期号:2
DOI10.3847/1538-4357/aa8bb8
产权排序第1完成单位
收录类别SCI
关键词Binaries: Close Binaries: Eclipsing Stars: Individuals (1swaspj162117.36+441254.2) Starspots White Dwarfs Stars: Winds Outflows
摘要1SWASP J162117.36+441254.2 was originally classified as an EW-type binary with a period of 0.20785 days. However, it was detected to have undergone a stellar outburst on 2016 June 3. Although the system was later classified as a cataclysmic variable (CV) and the event was attributed as a dwarf nova outburst, the physical reason is still unknown. This binary has been monitored photometrically since 2016 April 19, and many light curves were obtained before, during, and after the outburst. Those light and color curves observed before the outburst indicate that the system is a special CV. The white dwarf is not accreting material from the secondary and there are no accretion disks surrounding the white dwarf. By comparing the light curves obtained from 2016 April 19 to those from September 14, it was found that magnetic activity of the secondary is associated with the outburst. We show strong evidence that the L-1 region on the secondary was heavily spotted before and after the outburst and thus quench the mass transfer, while the outburst is produced by a sudden mass accretion of the white dwarf. These results suggest that J162117 is a good astrophysical laboratory to study stellar magnetic activity and its influences on CV mass transfer and mass accretion.
项目资助者Chinese Natural Science Foundation(11325315, 11573063, 11133007) ; Key Science Foundation of Yunnan Province(2017FA001) ; project GA CR(16-01116S)
语种英语
学科领域天文学
文章类型Article
ISSN0004-637X
URL查看原文
WOS记录号WOS:000413701200004
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]SHORT-PERIOD LIMIT ; CATACLYSMIC VARIABLES ; STAR-SPOTS ; EVOLUTION
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文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/11956
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
通讯作者Qian, S. -B.(Chinese Acad Sci, Yunnan Observ, POB 110, Kunming 650011, Yunnan, Peoples R China)
作者单位1.Yunnan Observatories, Chinese Academy of Sciences (CAS), P.O. Box 110, 650011 Kunming, China
2.Key Laboratory of the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, P.O. Box 110, 650011 Kunming, China
3.Center for Astronomical Mega-Science, Chinese Academy of Sciences, 20A Datun Road, Chaoyang District, Beijing, 100012, China
4.University of the Chinese Academy of Sciences, Yuquan Road 19#, Sijingshang Block, 100049 Beijing, China
5.Department of Theoretical Physics and Astrophysics, Masaryk University, Kotlářská 2, CZ-611 37 Brno, Czech Republic
6.Instituto de Astronomía, Universidad Nacional Autónoma de México, Ensenada, Baja California, México
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Qian SB,Han ZT,Zhang B,et al. A New Stellar Outburst Associated with the Magnetic Activities of the K-type Dwarf in a White Dwarf Binary[J]. ASTROPHYSICAL JOURNAL,2017,848(2).
APA Qian SB.,Han ZT.,Zhang B.,Zejda, M..,Michel, R..,...&Qian, S. -B..(2017).A New Stellar Outburst Associated with the Magnetic Activities of the K-type Dwarf in a White Dwarf Binary.ASTROPHYSICAL JOURNAL,848(2).
MLA Qian SB,et al."A New Stellar Outburst Associated with the Magnetic Activities of the K-type Dwarf in a White Dwarf Binary".ASTROPHYSICAL JOURNAL 848.2(2017).
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