AT 2023lli: A Tidal Disruption Event with Prominent Optical Early Bump and Delayed Episodic X-Ray Emission

doi:10.3847/2041-8213/ad319f

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	AT 2023lli: A Tidal Disruption Event with Prominent Optical Early Bump and Delayed Episodic X-Ray Emission
	Huang, Shifeng 9,10; Jiang, Ning 9,10; Zhu, Jiazheng 9,10; Wang, Yibo 9,10; Wang, Tinggui 8,9,10; Wang, Shan-Qin 7; Gan, Wen-Pei 6; Liang, En-Wei 7; Qin, Yu-Jing 5; Lin, Zheyu 9,10
刊名	ASTROPHYSICAL JOURNAL LETTERS
	2024-04-01
卷号	964 期号:2
ISSN号	2041-8205
DOI	10.3847/2041-8213/ad319f
产权排序	第8完成单位
文献子类	Article
英文摘要	High-cadence, multiwavelength observations have continuously revealed the diversity of tidal disruption events (TDEs), thus greatly advancing our knowledge and understanding of TDEs. In this work, we conducted an intensive optical-UV and X-ray follow-up campaign of TDE AT 2023lli and found a remarkable month-long bump in its UV/optical light curve nearly 2 months prior to maximum brightness. The bump represents the longest separation time from the main peak among known TDEs to date. The main UV/optical outburst declines as t -4.10, making it one of the fastest-decaying optically selected TDEs. Furthermore, we detected sporadic X-ray emission 30 days after the UV/optical peak, accompanied by a reduction in the period of inactivity. It is proposed that the UV/optical bump could be caused by the self-intersection of the stream debris, whereas the primary peak is generated by the reprocessed emission of the accretion process. In addition, our results suggest that episodic X-ray radiation during the initial phase of decline may be due to the patched obscurer surrounding the accretion disk, a phenomenon associated with the inhomogeneous reprocessing process. The double TDE scenario, in which two stars are disrupted in sequence, is also a possible explanation for producing the observed early bump and main peak. We anticipate that the multicolor light curves of TDEs, especially in the very early stages, and the underlying physics can be better understood in the near future with the assistance of dedicated surveys such as the deep high-cadence survey of the 2.5 m Wide Field Survey Telescope.
学科主题	天文学
URL标识	查看原文
出版地	TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
资助项目	MOST divided by National Key Research and Development Program of China (NKPs)https://doi.org/10.13039/501100012166[2023YFA1608100]; National Key Research and Development Program of China[12303050]; National Natural Science Foundation of China[XDB0550200]; National Natural Science Foundation of China[XDB41000000]; National Natural Science Foundation of China[XDB0550300]; Strategic Priority Research Program of the Chinese Academy of Sciences[2308085QA32]; Anhui Provincial Natural Science Foundation[CMS-CSST-2021-A13]; China Manned Space Project[WK3440000006]; Fundamental Research Funds for Central Universities[2023M743397]; China Postdoctoral Science Foundation; Fundamental Research Funds for the Central Universities; Cyrus Chun Ying Tang Foundations; University of Science and Technology of China, Purple Mountain Observatory - TAP member institutes; Chinese Academy of Sciences; California Institute of Technology; People's Government of Yunnan Province - ESA Member States; Asteroid Terrestrial-impact Last Alert System (ATLAS) project[NN12AR55G]; Asteroid Terrestrial-impact Last Alert System (ATLAS) project[80NSSC18K0284]; Asteroid Terrestrial-impact Last Alert System (ATLAS) project[80NSSC18K1575]; Asteroid Terrestrial-impact Last Alert System (ATLAS) project[J1944/80NSSC19K0112]; Asteroid Terrestrial-impact Last Alert System (ATLAS) project[HST GO-15889]; Asteroid Terrestrial-impact Last Alert System (ATLAS) project is primarily funded to search for near-Earth asteroids through NASA[ST/T000198/1]; Asteroid Terrestrial-impact Last Alert System (ATLAS) project is primarily funded to search for near-Earth asteroids through NASA[ST/S006109/1]; STFC; South African Astronomical Observatory
WOS关键词	BLACK-HOLE MASS ; NUCLEAR TRANSIENT ; HYDRODYNAMICAL SIMULATIONS ; EARLY EVOLUTION ; INFRARED ECHO ; STELLAR MASS ; STARS ; DISCOVERY ; TELESCOPE ; CANDIDATE
WOS研究方向	Astronomy & Astrophysics
语种	英语
出版者	IOP Publishing Ltd
WOS记录号	WOS:001191116800001
资助机构	MOST divided by National Key Research and Development Program of China (NKPs)https://doi.org/10.13039/501100012166[2023YFA1608100] ; National Key Research and Development Program of China[12303050] ; National Natural Science Foundation of China[XDB0550200, XDB41000000, XDB0550300] ; Strategic Priority Research Program of the Chinese Academy of Sciences[2308085QA32] ; Anhui Provincial Natural Science Foundation[CMS-CSST-2021-A13] ; China Manned Space Project[WK3440000006] ; Fundamental Research Funds for Central Universities[2023M743397] ; China Postdoctoral Science Foundation ; Fundamental Research Funds for the Central Universities ; Cyrus Chun Ying Tang Foundations ; University of Science and Technology of China, Purple Mountain Observatory - TAP member institutes ; Chinese Academy of Sciences ; California Institute of Technology ; People's Government of Yunnan Province - ESA Member States ; Asteroid Terrestrial-impact Last Alert System (ATLAS) project[NN12AR55G, 80NSSC18K0284, 80NSSC18K1575, J1944/80NSSC19K0112, HST GO-15889] ; Asteroid Terrestrial-impact Last Alert System (ATLAS) project is primarily funded to search for near-Earth asteroids through NASA[ST/T000198/1, ST/S006109/1] ; STFC ; South African Astronomical Observatory
内容类型	期刊论文
版本	出版稿
源URL	[http://ir.ynao.ac.cn/handle/114a53/26752]
专题	云南天文台_丽江天文观测站（南方基地）
作者单位	1.Institute of Optics and Electronics, Chinese Academy of Sciences, Chengdu 610209, People's Republic of China 2.Key Laboratory for the Structure and Evolution of Celestial Objects, Yunnan Observatories, Kunming 650011, People's Republic of China; 3.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650011, People's Republic of China; 4.National Astronomical Observatory of Japan, National Institutes of Natural Sciences, Tokyo 181-8588, Japan; 5.Division of Physics, Mathematics and Astronomy, California Institute of Technology, 1200 E. California Blvd., Pasadena, CA 91125, USA; 6.Nanjing Hopes Technology Co., Ltd. Pukou District Nanjing, 210000, People's Republic of China; 7.Guangxi Key Laboratory for Relativistic Astrophysics, School of Physical Science and Technology, Guangxi University, Nanning 530004, People's Republic of China; 8.Institute of Deep Space Sciences, Deep Space Exploration Laboratory, Hefei 230026, People's Republic of China; 9.School of Astronomy and Space Sciences, University of Science and Technology of China, Hefei, 230026, People's Republic of China; 10.CAS Key Laboratory for Research in Galaxies and Cosmology, Department of Astronomy, University of Science and Technology of China, Hefei, 230026, People's Republic of China; sfhuang999@ustc.edu.cn, jnac@ustc.edu.cn, twang@ustc.edu.cn;
推荐引用方式 GB/T 7714	Huang, Shifeng,Jiang, Ning,Zhu, Jiazheng,et al. AT 2023lli: A Tidal Disruption Event with Prominent Optical Early Bump and Delayed Episodic X-Ray Emission[J]. ASTROPHYSICAL JOURNAL LETTERS,2024,964(2).
APA	Huang, Shifeng.,Jiang, Ning.,Zhu, Jiazheng.,Wang, Yibo.,Wang, Tinggui.,...&Zuo, Yingxi.(2024).AT 2023lli: A Tidal Disruption Event with Prominent Optical Early Bump and Delayed Episodic X-Ray Emission.ASTROPHYSICAL JOURNAL LETTERS,964(2).
MLA	Huang, Shifeng,et al."AT 2023lli: A Tidal Disruption Event with Prominent Optical Early Bump and Delayed Episodic X-Ray Emission".ASTROPHYSICAL JOURNAL LETTERS 964.2(2024).