Flare-related plasma motions in the outer atmosphere of the RS CVn-type star II Peg
文献类型：期刊论文
| 作者 | 曹东涛(1,2,3★); 顾盛宏(1,2,4★) |
| 刊名 | ASTRONOMY & ASTROPHYSICS
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| 出版日期 | 2024-10-16 |
| 卷号 | 690 |
| 关键词 | Sun: filaments, prominences stars: activity stars: coronae stars: flare stars: magnetic field |
| ISSN号 | 0004-6361 |
| DOI | 10.1051/0004-6361/202450931 |
| 产权排序 | 第1完成单位 |
| 文献子类 | Article |
| 英文摘要 | Analogous to solar flares, stellar flares are dramatic explosions in the atmosphere, which may be accompanied by prominence eruptions, coronal mass ejections (CMEs), and other forms of plasma motion. Based on time-resolved spectroscopic observations of the RS CVn-type star II Peg, we aim to search for the potential plasma motions associated with flares. In these observations, we detected part of the gradual decay phase of an optical flare, for which we find a lower limit on the energy of the H alpha line of 6.03 x 10(33) erg. Converting this H alpha energy, we find a bolometric white-light energy of 3.10 x 10(35) erg. Moreover, a secondary peak is also observed. After removing a quiescence reference, the H alpha residual shows an asymmetric behavior, including both a blueshifted and a redshifted emission component. The former component has a bulk velocity of about -180 km s(-1) and extends its velocity to more than -350 km s(-1). This phenomenon is likely caused by a prominence eruption event or a chromospheric evaporation process. The latter emission component has a bulk velocity of 130-70 km s(-1) and extends its velocity to nearly 400 km s(-1). We attribute the redshifted emission component to one or a combination of several possible scenarios: flare-driven coronal rain, chromospheric condensation, backward-directed prominence eruption close to the stellar limb, or falling material in a prominence eruption. The minimum masses of the moving plasmas resulting in the blueshifted and redshifted emission components are estimated to be 0.56 x 10(20) g and 1.74 x 10(20) g, respectively. |
| 学科主题 | 天文学 ; 恒星与银河系 |
| URL标识 | 查看原文 |
| 出版地 | 17, AVE DU HOGGAR, PA COURTABOEUF, BP 112, F-91944 LES ULIS CEDEX A, FRANCE |
| WOS关键词 | CORONAL MASS EJECTIONS ; MAIN-SEQUENCE STARS ; ALPHA LINE-PROFILES ; H-ALPHA ; CANUM-VENATICORUM ; X-RAY ; ROTATIONAL MODULATION ; OPTICAL OBSERVATIONS ; MAGNETIC ACTIVITY ; BINARY-SYSTEMS |
| 资助项目 | Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences; National Natural Science Foundation of China (NSFC)[10373023]; National Natural Science Foundation of China (NSFC)[10773027]; National Natural Science Foundation of China (NSFC)[11333006]; National Natural Science Foundation of China (NSFC)[U1531121]; Yunnan Fundamental Research Projects[202201AT070186]; Yunnan Fundamental Research Projects[202305AS350009]; Yunnan Revitalization Talent Support Program (Young Talent Project); International Centre of Supernovae, Yunnan Key Laboratory[202302AN360001]; China Manned Space Project |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:001334189800002 |
| 出版者 | EDP SCIENCES S A |
| 资助机构 | Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences ; National Natural Science Foundation of China (NSFC)[10373023, 10773027, 11333006, U1531121] ; Yunnan Fundamental Research Projects[202201AT070186, 202305AS350009] ; Yunnan Revitalization Talent Support Program (Young Talent Project) ; International Centre of Supernovae, Yunnan Key Laboratory[202302AN360001] ; China Manned Space Project |
| 版本 | 出版稿 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/27645]  |
| 专题 | 云南天文台_系外行星研究组 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.School of Astronomy and Space Science, University of Chinese Academy of Sciences, Beijing 101408, China 2.International Centre of Supernovae, Yunnan Key Laboratory, Kunming 650216, China; 3.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650216, China; 4.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650216, China; |
| 推荐引用方式 GB/T 7714 | Cao DT,Gu SH. Flare-related plasma motions in the outer atmosphere of the RS CVn-type star II Peg[J]. ASTRONOMY & ASTROPHYSICS,2024,690. |
| APA | 曹东涛,&顾盛宏.(2024).Flare-related plasma motions in the outer atmosphere of the RS CVn-type star II Peg.ASTRONOMY & ASTROPHYSICS,690. |
| MLA | 曹东涛,et al."Flare-related plasma motions in the outer atmosphere of the RS CVn-type star II Peg".ASTRONOMY & ASTROPHYSICS 690(2024). |
入库方式： OAI收割
来源：云南天文台
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