| AT2021aeuk: A Repeating Partial Tidal Disruption Event Candidate in a Narrow-line Seyfert 1 Galaxy | |
Sun, Jingbo1,2; Guo, Hengxiao1; Gu, Minfeng1; Li, Ya-Ping1; Chen, Yongjun1; González-Buitrago, D.3,4; Wang JG(王建国)5,6 ; Li SS(李莎莎)5,6; Feng HC(封海成)5,6; Xiong DR(熊定荣)5,6; Wang, Yanan7; Yuan, Qi8; Jin, Jun-jie7; Zhang, Wenda7; Deng, Hongping1; Zhang, Minghao7
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| 发表期刊 | ASTROPHYSICAL JOURNAL (IF:5.551[JCR-2017],5.402[5-Year]) |
| 2025-04-01 | |
| 卷号 | 982期号:2 |
| DOI | 10.3847/1538-4357/adb724 |
| 产权排序 | 第5完成单位 |
| 收录类别 | SCI |
| 摘要 | A black hole (BH) can tear apart a star that ventures within its tidal radius, producing a luminous flare as the stellar debris falls back, known as a tidal disruption event (TDE). While TDEs in quiescent galaxies are relatively well understood, identifying TDEs in active galactic nuclei (AGNs) still remains a significant challenge. We present the discovery of AT2021aeuk, a transient exhibiting dual flares within around 3 yr in a narrow-line Seyfert 1 galaxy. Multiwavelength observations triggered during the second flare in 2023 revealed an extraordinary X-ray V-shaped light curve, strongly anticorrelated with the optical light curve and accompanied by a lag of similar to 40 days. This behavior is inconsistent with both supernova and pure AGN origins. In addition, a new broad component emerges in the Balmer lines during the second flare, showing a clear reverberation signal to the continuum variation. We propose that the dual flare may be linked to a repeating partial TDE (rpTDE), where the second flare results from a collision between the TDE stream and the inner accretion disk, triggering an optical flare while simultaneously partially destroying the X-ray corona. However, other mechanisms, such as a stellar-mass BH merger within an accretion disk, could produce similar phenomena, which we cannot entirely rule out. The Vera C. Rubin Observatory will be a powerful tool for further investigating the nature of such events in the future. |
| 资助项目 | MOST divided by National Key Research and Development Program of China (NKPs)https://doi.org/10.13039/501100012166[2023YFA1607903]; MOST divided by National Key Research and Development Program of China (NKPs)https://doi.org/10.13039/501100012166[2022YFF0503402]; National Key R&D Program of China[1247030223]; National Natural Science Foundation of China (NSFC)[018GJHZ2022029FN]; Future Network Partner Program, CAS[178GJHZ2023184MI]; Future Network Partner Program, CAS[NSFC-12473019]; Overseas Center Platform Projects, CAS[JCYJ-SHFY-2021-013]; Shanghai Pilot Program for Basic Research-Chinese Academy of Science, Shanghai Branch[2022SKA0120102]; National SKA Program of China[CMSCSST-2021-A06]; National SKA Program of China[NSFC-12203096]; China Manned Space Project[202301AT070358]; China Manned Space Project[NSFC-12373070]; China Manned Space Project[NSFC-12192223]; Yunnan Fundamental Research Projects[23ZR1473700]; Yunnan Fundamental Research Projects[NSFC-12333004]; Natural Science Foundation of Shanghai[XDB0550200]; Strategic Priority Research Program of the Chinese Academy of Sciences |
| 项目资助者 | MOST divided by National Key Research and Development Program of China (NKPs)https://doi.org/10.13039/501100012166[2023YFA1607903, 2022YFF0503402] ; National Key R&D Program of China[1247030223] ; National Natural Science Foundation of China (NSFC)[018GJHZ2022029FN] ; Future Network Partner Program, CAS[178GJHZ2023184MI, NSFC-12473019] ; Overseas Center Platform Projects, CAS[JCYJ-SHFY-2021-013] ; Shanghai Pilot Program for Basic Research-Chinese Academy of Science, Shanghai Branch[2022SKA0120102] ; National SKA Program of China[CMSCSST-2021-A06, NSFC-12203096] ; China Manned Space Project[202301AT070358, NSFC-12373070, NSFC-12192223] ; Yunnan Fundamental Research Projects[23ZR1473700, NSFC-12333004] ; Natural Science Foundation of Shanghai[XDB0550200] ; Strategic Priority Research Program of the Chinese Academy of Sciences |
| 语种 | 英语 |
| 学科领域 | 天文学天文学 ; 星系与宇宙学 |
| 文章类型 | Article |
| 出版者 | IOP Publishing Ltd |
| 出版地 | TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND |
| ISSN | 0004-637X |
| URL | 查看原文 |
| WOS记录号 | WOS:001453726500001 |
| WOS研究方向 | Astronomy & Astrophysics |
| WOS类目 | Astronomy & Astrophysics |
| 关键词[WOS] | ACTIVE GALACTIC NUCLEI ; DIGITAL SKY SURVEY ; EXTREME VARIABILITY QUASARS ; SUPERMASSIVE BLACK-HOLES ; X-RAY-EMISSION ; OPTICAL CONTINUUM ; SPACE TELESCOPE ; ACCRETION RATES ; DISK FORMATION ; LIGHT CURVES |
| 引用统计 | 正在获取...
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| 文献类型 | 期刊论文 |
| 版本 | 出版稿 |
| 条目标识符 | http://ir.ynao.ac.cn/handle/114a53/28235 |
| 专题 | 南方基地 中国科学院天体结构与演化重点实验室 |
| 作者单位 | 1.Shanghai Astronomical Observatory, Chinese Academy of Sciences, 80 Nandan Road, Shanghai 200030, People's Republic of China; sunjingbo@shao.ac.cn, hengxiaoguo@gmail.com; 2.University of Chinese Academy of Sciences, 19A Yuquan Road, 100049, Beijing, People's Republic of China; 3.Universidad Nacional Autónoma de México, Instituto de Astronomía, AP 106, Ensenada 22860, BC, México; 4.Department of Physics and Astronomy, 4129 Frederick Reines Hall, University of California, Irvine, CA 92697-4575, USA; 5.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650011, Yunnan, People's Republic of China; 6.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650011, Yunnan, People's Republic of China; 7.National Astronomical Observatories, Chinese Academy of Sciences, 20A Datun Road, Beijing 100101, People's Republic of China; 8.Changchun Observatory, National Astronomical Observatories, Chinese Academy of Sciences, Changchun 130117, People's Republic of China |
| 推荐引用方式 GB/T 7714 | Sun, Jingbo,Guo, Hengxiao,Gu, Minfeng,et al. AT2021aeuk: A Repeating Partial Tidal Disruption Event Candidate in a Narrow-line Seyfert 1 Galaxy[J]. ASTROPHYSICAL JOURNAL,2025,982(2). |
| APA | Sun, Jingbo.,Guo, Hengxiao.,Gu, Minfeng.,Li, Ya-Ping.,Chen, Yongjun.,...&Zhang, Minghao.(2025).AT2021aeuk: A Repeating Partial Tidal Disruption Event Candidate in a Narrow-line Seyfert 1 Galaxy.ASTROPHYSICAL JOURNAL,982(2). |
| MLA | Sun, Jingbo,et al."AT2021aeuk: A Repeating Partial Tidal Disruption Event Candidate in a Narrow-line Seyfert 1 Galaxy".ASTROPHYSICAL JOURNAL 982.2(2025). |
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| AT2021aeuk_ A Repeat（44472KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | 浏览 请求全文 | |
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