Optical flares and flaring oscillations on the M-type eclipsing binary CU Cancri
文献类型：期刊论文
| 作者 | 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
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| 刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
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| 出版日期 | 2012-07 |
| 卷号 | 423期号:4页码:3646-3651 |
| 关键词 | stars: activity binaries: close binaries: eclipsing stars: flare stars: individual: CU Cancri stars: late-type |
| ISSN号 | 0035-8711 |
| 产权排序 | 第一完成单位 |
| 通讯作者 | Qian, SB (reprint author), Chinese Acad Sci, Yunnan Astron Observ, Natl Astron Observ, POB 110, Kunming 650011, Peoples R China. |
| 英文摘要 | In 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. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 学科主题 | Astronomy & Astrophysics |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | LOW-MASS STARS ; LOWER MAIN-SEQUENCE ; M-DWARFS ; EVOLUTIONARY MODELS ; ABSOLUTE DIMENSIONS ; OBSERVATIONAL DATA ; MAGNETIC ACTIVITY ; OPEN CLUSTERS ; SYSTEM ; RADII |
| 收录类别 | SCI |
| 原文出处 | http://mnras.oxfordjournals.org/content/423/4/3646 |
| 语种 | 英语 |
| WOS记录号 | WOS:000306003600050 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/5866]  |
| 专题 | 云南天文台_双星与变星研究组 云南天文台_中国科学院天体结构与演化重点实验室 |
| 作者单位 | 1.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 |
| 推荐引用方式 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.,...&Dai ZB.(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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来源：云南天文台
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