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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
Source PublicationThe Astrophysical Journal
2017-10-24
Volume848Issue:2
DOI10.3847/1538-4357/aa8bb8
Contribution Rank第1完成单位
Indexed BySCI
Keywordbinaries: close binaries: eclipsing stars: individuals (1SWASPJ162117.36+441254.2) stars: winds, outflows starspots white dwarfs
Abstract

Abstract 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 L1 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.

Funding ProjectChinese Natural Science Foundation[11325315] ; Chinese Natural Science Foundation[11573063] ; Chinese Natural Science Foundation[11133007] ; Key Science Foundation of Yunnan Province[2017FA001] ; project GA CR[16-01116S]
Funding OrganizationChinese Natural Science Foundation[11325315] ; Chinese Natural Science Foundation[11573063] ; Chinese Natural Science Foundation[11133007] ; Key Science Foundation of Yunnan Province[2017FA001] ; project GA CR[16-01116S]
Language英语
Subject Area天文学
MOST Discipline Catalogue理学 ; 理学::天文学
SubtypeArticle
PublisherIOP PUBLISHING LTD
Publication PlaceChinese Natural Science Foundation[11325315]; Chinese Natural Science Foundation[11573063]; Chinese Natural Science Foundation[11133007]; Key Science Foundation of Yunnan Province[2017FA001]; project GA CR[16-01116S]
ISSN0004-637X
URL查看原文
WOS IDWOS:000413701200004
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordShort-period Limit ; Cataclysmic Variables ; Star-spots ; Evolution
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/11956
Collection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
Corresponding AuthorQian SB(钱声帮)
Affiliation1.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, Kotlá?ská 2, CZ-611 37 Brno, Czech Republic
6.Instituto de Astronomía, Universidad Nacional Autónoma de México, Ensenada, Baja California, México
First Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Corresponding Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
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]. The Astrophysical Journal,2017,848(2).
APA Qian SB.,Han ZT.,Zhang B.,Zejda, M..,Michel, R..,...&Wang ZH.(2017).A New Stellar Outburst Associated with the Magnetic Activities of the K-type Dwarf in a White Dwarf Binary.The 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".The Astrophysical Journal 848.2(2017).
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