A ΔR ～ 9.5 mag Superflare of an Ultracool Star Detected by the SVOM/GWAC System
文献类型：期刊论文
| 作者 | Xin,L. P.7; Li,H. L.7; Wang,J.7,8; Han,X. H.7; Xu,Y.7; Meng,X. M.7; Cai,H. B.7; Huang,L.7; Lu,X. M.7; Qiu,Y. L.7 |
| 刊名 | The Astrophysical Journal
 |
| 出版日期 | 2021-03-01 |
| 卷号 | 909期号:2 |
| ISSN号 | 0004-637X |
| 关键词 | Flare stars M dwarf stars Stellar flares Spectroscopy |
| DOI | 10.3847/1538-4357/abdd1b |
| 英文摘要 | Abstract We report the detection and follow-up of a superstellar flare GWAC 181229A with an amplitude of ΔR ～ 9.5 mag on an M9-type star by SVOM/GWAC and the dedicated follow-up telescopes. The estimated bolometric energy E bol is (5.56–9.25) × 1034 erg, which makes the event one of the most powerful flares seen on ultracool stars. The magnetic strength is inferred to be 3.6–4.7 kG. Thanks to sampling with a cadence of 15 s, a new component near the peak time with a very steep decay is detected in the R-band light curve, followed by the two-component flare template given by Davenport et al. An effective temperature of 5340 ± 40 K is measured by fitting a blackbody shape to the spectrum in the shallower phase during the flare. The filling factors of the flare are estimated to be ～30% and 19% at the peak time and at 54 minutes after the first detection. The detection of this particular event with large amplitude, huge emitted energy, and a new component demonstrates that high-cadence sky monitoring cooperation with fast follow-up observations is very important for understanding the violent magnetic activity. |
| 语种 | 英语 |
| 出版者 | The American Astronomical Society |
| WOS记录号 | IOP:0004-637X-909-2-abdd1b |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/58042]  |
| 专题 | 中国科学院国家天文台 |
| 作者单位 | 1.School of Astronomy and Space Science, University of Chinese Academy of Sciences, Beijing, People’s Republic of China 2.School of Astronomy and Space Science, Nanjing University, Nanjing 210093, People’s Republic of China 3.Key Laboratory of Modern Astronomy and Astrophysics (Nanjing University), Ministry of Education, Nanjing 210093, People’s Republic of China 4.Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, People’s Republic of China 5.Université Paris-Saclay, CNRS, CEA, Département d’Astrophysique, Instrumentation et Modélisation de Paris-Saclay, F-91191, Gif-sur-Yvette, France 6.School of Physics and Electronic Information, Huaibei Normal University, Huaibei 235000, People’s Republic of China 7.CAS Key Laboratory of Space Astronomy and Technology, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, People’s Republic of China; wjy@nao.cas.cn 8.Guangxi Key Laboratory for Relativistic Astrophysics, School of Physical Science and Technology, Guangxi University, Nanning 530004, People’s Republic of China |
| 推荐引用方式 GB/T 7714 | Xin,L. P.,Li,H. L.,Wang,J.,等. A ΔR ～ 9.5 mag Superflare of an Ultracool Star Detected by the SVOM/GWAC System[J]. The Astrophysical Journal,2021,909(2). |
| APA | Xin,L. P..,Li,H. L..,Wang,J..,Han,X. H..,Xu,Y..,...&Wei,J. Y..(2021).A ΔR ～ 9.5 mag Superflare of an Ultracool Star Detected by the SVOM/GWAC System.The Astrophysical Journal,909(2). |
| MLA | Xin,L. P.,et al."A ΔR ～ 9.5 mag Superflare of an Ultracool Star Detected by the SVOM/GWAC System".The Astrophysical Journal 909.2(2021). |
入库方式： OAI收割
来源：国家天文台
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。