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Optical flares and flaring oscillations on the M-type eclipsing binary CU Cancri
Qian SB(钱声帮)1,2,3; Zhang J(张嘉)1,2,3; Zhu LY(朱俐颖)1,2; Liu L(刘亮)1,2; Liao WP(廖文萍)1,2; Zhao EG(赵二刚)1,2; He JJ(何家佳)1,2; Li LJ(李临甲)1,2,3; Li K(李凯)1,2,3; Dai ZB(戴智斌)1,2; Qian, SB (reprint author), Chinese Acad Sci, Yunnan Astron Observ, Natl Astron Observ, POB 110, Kunming 650011, Peoples R China.
Source PublicationMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
2012-07
Volume423Issue:4Pages:3646-3651
DOI10.1111/j.1365-2966.2012.21157.x
Contribution Rank第1完成单位
Indexed BySCI
KeywordStars: Activity Binaries: Close Binaries: Eclipsing Stars: Flare Stars: Individual: Cu Cancri Stars: Late-type
AbstractIn this paper, we report on the discovery of an optical flare observed in the R band from the red-dwarf eclipsing binary CU Cancri, whose component stars are at the upper boundary of full convection (M1= 0.43 M? and M2= 0.4 M?, where M? is the solar mass). The amplitude of the flare is the largest among those detected in the R band (similar to 0.52 mag) and the duration time is about 73 min. Like flares observed on the Sun, quasi-periodic oscillations were seen during and after the flare. Three more R-band flares were found by follow-up monitoring. In total, this binary was monitored photometrically by using an R filter for 79.9 h, which has revealed an R-band flare rate of about 0.05 flares per hour. Together with other strong chromospheric and coronal activities (i.e. very strong Ha and H beta emission features and an extreme ultraviolet and X-ray source), these detections indicate that it has very strong magnetic activity. Therefore, the apparent faintness (similar to 1.4 mag in the V band) of CU Cnc, compared with other single red dwarfs of the same mass, can be plausibly explained by the high coverage of dark spots.
Funding OrganizationChinese Natural Science Foundation [11133007, 10973037, 10903026, 11003040] ; West Light Foundation of the Chinese Academy of Sciences
Language英语
Subject AreaAstronomy & Astrophysics
SubtypeArticle
ISSN0035-8711
URL查看原文
Archive Date2012-09-04
WOS IDWOS:000306003600050
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordLOW-MASS STARS ; LOWER MAIN-SEQUENCE ; M-DWARFS ; EVOLUTIONARY MODELS ; ABSOLUTE DIMENSIONS ; OBSERVATIONAL DATA ; MAGNETIC ACTIVITY ; OPEN CLUSTERS ; SYSTEM ; RADII
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Cited Times:24[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/5866
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 (reprint author), Chinese Acad Sci, Yunnan Astron Observ, Natl Astron Observ, POB 110, Kunming 650011, Peoples R China.
Affiliation1.National Astronomical Observatories/Yunnan Astronomical Observatory, Chinese Academy of Sciences, PO Box 110, 650011 Kunming, China
2.Key Laboratory of the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, PO Box 110, 650011 Kunming, China
3.Graduate University of the Chinese Academy of Sciences, Yuquan Road 19, Sijingshang Block, 100049 Beijing City, China
First Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Qian SB,Zhang J,Zhu LY,et al. Optical flares and flaring oscillations on the M-type eclipsing binary CU Cancri[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2012,423(4):3646-3651.
APA Qian SB.,Zhang J.,Zhu LY.,Liu L.,Liao WP.,...&Qian, SB .(2012).Optical flares and flaring oscillations on the M-type eclipsing binary CU Cancri.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,423(4),3646-3651.
MLA Qian SB,et al."Optical flares and flaring oscillations on the M-type eclipsing binary CU Cancri".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 423.4(2012):3646-3651.
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