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

• Published in: The Astrophysical journal Vol. 980; no. 2; pp. 268 - 282
• Main Authors: Mao, Xuan, Liu, He-Yang, Wang, Song, Ling, Zhixing, Yuan, Weimin, Cheng, Huaqing, Pan, Haiwu, Li, Dongyue, Favata, Fabio, Ji, Tuo, Zhang, Jujia, Zhao, Xinlin, Wang, Jing, Liu, Mingjun, Liu, Yuan, Cai, Zhiming, Castro-Tirado, Alberto J., Dai, Yanfeng, Deng, Licai, Ding, Xu, Ji, Kaifan, Jin, Chichuan, Lei, Yajuan, Li, Huali, Lin, Jun, Liu, Huaqiu, Liu, Shuai, Sun, Hui, Sun, Shengli, Sun, Xiaojin, Shi, Jianrong, Wang, Jianguo, Wang, Jingxiu, Wang, Wenxin, Wei, Jianyan, Xin, Liping, Xiong, Dingrong, Zhang, Chen, Zhang, Wenda, Zhang, Yonghe, Zhang, Xiaofeng, Zhao, Donghua, Zhou, Guiping
• Format: Journal Article
• Language: English
• Published: The American Astronomical Society 20.02.2025; IOP Publishing
• Subjects: Stellar activity; Stellar flares; X-ray transient sources

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...