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LEIA Discovery of the Longest-lasting and Most Energetic Stellar X-Ray Flare Ever Detected

文献类型：期刊论文

作者Mao, Xuan9,10; Liu, He-Yang9; Wang, Song9,12; Ling, Zhixing9,10,12; Yuan, Weimin9,10; Cheng, Huaqing9; Pan, Haiwu9; Li, Dongyue9; Favata, Fabio13,14; Ji, Tuo18
刊名ASTROPHYSICAL JOURNAL
出版日期2025-02-20
卷号980期号:2
ISSN号0004-637X
DOI10.3847/1538-4357/ada698
产权排序第7完成单位
文献子类Article
英文摘要The Lobster Eye Imager for Astronomy (LEIA) detected a new X-ray transient on 2022 November 7, identified as a superflare event occurring on a nearby K-type giant star HD 251108. The flux increase was also detected in follow-up observations at X-ray, UV, and optical wavelengths. The flare lasted for about 40 days in soft X-ray observations, reaching a peak luminosity of similar to 1.1 x 1034 erg s-1 in 0.5-4.0 keV, which is roughly 60 times the quiescent luminosity. Optical brightening was observed for only one night. The X-ray light curve is well described by a double fast rise and exponential decay model, attributed to the cooling process of a loop arcade structure formed subsequent to the initial large loop with a half-length of similar to 1.9 x 1012 cm. Time-resolved X-ray spectra were fitted by a four-temperature apec model (with three components being the quiescent background), showing significant evolution of plasma temperature and emission measure over time. The estimated energy released in the LEIA band is similar to 3 x 1039 erg, suggesting that this is likely the most energetic X-ray stellar flare with the longest duration detected to date.
学科主题天文学 ; 恒星与银河系 ; 星系与宇宙学
URL标识查看原文
出版地TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
WOS关键词LOBSTER-EYE-IMAGER ; STATISTICAL PROPERTIES ; UNIVERSAL CORRELATION ; EMISSION MEASURE ; STARS ; SOLAR ; SUPERFLARES ; CATALOG ; TEMPERATURE ; DIAGNOSTICS
资助项目Strategic Priority Program on Space Science of Chinese Academy of Sciences[XDA15310000]; Strategic Priority Program on Space Science of Chinese Academy of Sciences[XDA15052100]; National Key Research and Development Programs of China (NKRDPC)[2022YFF0711404]; National Key Research and Development Programs of China (NKRDPC)[2021YFA0718500]; National Key Research and Development Programs of China (NKRDPC)[2019YFA0405504]; National Key Research and Development Programs of China (NKRDPC)[2019YFA0405000]; National Natural Science Foundation of China (NSFC)[12103061]; National Natural Science Foundation of China (NSFC)[11988101]; National Natural Science Foundation of China (NSFC)[11833002]; National Natural Science Foundation of China (NSFC)[12090042]; National Natural Science Foundation of China (NSFC)[12103047]; National Natural Science Foundation of China (NSFC)[12473016]; Strategic Priority Program on Space Science of Chinese Academy of Sciences[XDB41000000]; Strategic Priority Program on Space Science of Chinese Academy of Sciences[XDB0550200]; Spanish Ministry projects[PID2020-118491GB-I00]; Spanish Ministry projects[PID2023-151905OB-I00]; Junta de Andalucia[P20_010168]; MCIN/AEI
WOS研究方向Astronomy & Astrophysics
语种英语
WOS记录号WOS:001426873900001
出版者IOP Publishing Ltd
资助机构Strategic Priority Program on Space Science of Chinese Academy of Sciences[XDA15310000, XDA15052100] ; National Key Research and Development Programs of China (NKRDPC)[2022YFF0711404, 2021YFA0718500, 2019YFA0405504, 2019YFA0405000] ; National Natural Science Foundation of China (NSFC)[12103061, 11988101, 11833002, 12090042, 12103047, 12473016] ; Strategic Priority Program on Space Science of Chinese Academy of Sciences[XDB41000000, XDB0550200] ; Spanish Ministry projects[PID2020-118491GB-I00, PID2023-151905OB-I00] ; Junta de Andalucia[P20_010168] ; MCIN/AEI[CEX2021-001131-S] ; [2022SKA0130102] ; [2022SKA0130100] ; [12273057] ; [12203071]
版本出版稿
源URL[http://ir.ynao.ac.cn/handle/114a53/28173]  
专题云南天文台_丽江天文观测站（南方基地）
云南天文台_太阳物理研究组
云南天文台_中国科学院天体结构与演化重点实验室
天文技术实验室
作者单位1.Yunnan Key Laboratory of Solar Physics and Space Science, Kunming 650216, People's Republic of China;
2.Center for Astronomical Mega-Science, Chinese Academy of Sciences, Beijing 100012, People's Republic of China;
3.Department of Astronomy, China West Normal University, Nanchong 637002, People's Republic of China;
4.Unidad Asociada al CSIC, Departamentode Ingeniería de Sistemas y Automática, Escuela de Ingenierías, Universidad de Málaga, Málaga, Spain;
5.Instituto de Astrofísica de Andalucía (IAA-CSIC), Granada, Spain;
6.Innovation Academy for Microsatellites, Chinese Academy of Sciences, Shanghai 201210, People's Republic of China;
7.GXU-NAOC Center for Astrophysics and Space Sciences, Nanning 530004, People's Republic of China;
8.Guangxi Key Laboratory for Relativistic Astrophysics, School of Physical Science and Technology, Guangxi University, Nanning 530004, People's Republic of China;
9.National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, People's Republic of China; liuheyang@nao.cas.cn, songw@bao.ac.cn, lingzhixing@bao.ac.cn, wmy@nao.cas.cn;
10.School of Astronomy and Space Science, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100049, People's Republic of China;
推荐引用方式
GB/T 7714		 Mao, Xuan,Liu, He-Yang,Wang, Song,et al. LEIA Discovery of the Longest-lasting and Most Energetic Stellar X-Ray Flare Ever Detected[J]. ASTROPHYSICAL JOURNAL,2025,980(2).
APA Mao, Xuan.,Liu, He-Yang.,Wang, Song.,Ling, Zhixing.,Yuan, Weimin.,...&Zhou, Guiping.(2025).LEIA Discovery of the Longest-lasting and Most Energetic Stellar X-Ray Flare Ever Detected.ASTROPHYSICAL JOURNAL,980(2).
MLA Mao, Xuan,et al."LEIA Discovery of the Longest-lasting and Most Energetic Stellar X-Ray Flare Ever Detected".ASTROPHYSICAL JOURNAL 980.2(2025).

入库方式： OAI收割

来源：云南天文台

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