Discovery of a Years-delayed Radio Flare from an Unusually Slowly Evolving Tidal Disruption Event Candidate
文献类型：期刊论文
| 作者 | Zhang, Zhumao8; Shu, Xinwen8; Yang, Lei8; Sun, Luming8; Ding, Hucheng8; Yan, Lin7; Jiang, Ning13; An, Fangxia6,9; Silima, Walter5; Zhang, Fabao8 |
| 刊名 | ASTROPHYSICAL JOURNAL
 |
| 出版日期 | 2026-01-20 |
| 卷号 | 997期号:1 |
| ISSN号 | 0004-637X |
| DOI | 10.3847/1538-4357/ae29f0 |
| 产权排序 | 第10完成单位 |
| 文献子类 | Article |
| 英文摘要 | SDSS J1115+0544 is a unique low-ionization nuclear emission-line region galaxy with energetic ultraviolet (UV), optical, and mid-infrared outbursts occurring in its nucleus. We present the results from an analysis of multiwavelength photometric and radio follow-up observations with a time span of approximate to 9 yr since its discovery. We find that following a luminosity plateau of approximate to 500 days, the UV/optical emission has decayed back to the preoutburst level, suggesting that the nuclear outburst might be caused by a stellar tidal disruption event (TDE). In this case, J1115+0544 could be an unusually slowly evolving optical TDE with longest rise and decline time scales ever found. Three years later than the optical peak, a delayed radio brightening was found with a luminosity as high as nu L nu(5.5 GHz) similar to 1.9 x 1039 erg s-1. Using a standard equipartition analysis, we find that the outflow powering the radio emission was launched at t greater than or similar to 1150 days with a velocity of v less than or similar to 0.1c and a minimal kinetic energy of EK greater than or similar to 3 x 1049 erg. The delayed radio brightening coupled with the disappearing plateau in the UV/optical light curves is consistent with the scenario involving delayed ejection of an outflow from a state transition in the disk. SDSS J1115+0544 is the first TDE candidate displaying both a short-lived UV/optical plateau emission and a late-time radio brightening. Future radio observations of these TDEs in the postplateau decay phase will help to establish the connection between outflow launching and changes in accretion rate. |
| 学科主题 | 天文学 ; 星系与宇宙学 |
| URL标识 | 查看原文 |
| 出版地 | No.2 The Distillery, Glassfields, Avon Street, Bristol, ENGLAND |
| WOS关键词 | RAPID TURN-ON ; RELATIVISTIC OUTFLOW ; LUMINOSITY FUNCTION ; NEARBY GALAXIES ; JET ENERGETICS ; DISC FORMATION ; BLACK-HOLES ; ACCRETION ; EMISSION ; ASTROPY |
| 资助项目 | MOST divided by National Natural Science Foundation of China (NSFC)[12192221]; Anhui Normal University (ANU)[2022SKA0130102] |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:001659790200001 |
| 出版者 | IOP Publishing Ltd |
| 资助机构 | MOST divided by National Natural Science Foundation of China (NSFC)[12192221] ; Anhui Normal University (ANU)[2022SKA0130102] |
| 版本 | 出版稿 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/28854]  |
| 专题 | 云南天文台_丽江天文观测站（南方基地） |
| 通讯作者 | Shu, Xinwen |
| 作者单位 | 1.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650011, People’s Republic of China; 2.Department of Astronomy, Guangzhou University, Guangzhou 510006, People’s Republic of China; 3.College of Physics, Guizhou University, Guiyang 550025, People’s Republic of China; 4.Indian Institute of Astrophysics (IIA), 2nd Block, Koramangala, Bengaluru, 560034, Karnataka, India; 5.Inter-University Institute for Data Intensive Astronomy (IDIA), Department of Astronomy, University of Cape Town, 7701 Rondebosch, Cape Town, South Africa; 6.Inter-University Institute for Data Intensive Astronomy (IDIA), Department of Physics and Astronomy, University of the Western Cape, 7535 Bellville, Cape Town, South Africa; 7.Caltech Optical Observatories, California Institute of Technology, Pasadena, CA 91125, USA; 8.Department of Physics, Anhui Normal University, Wuhu, Anhui 241002, People’s Republic of China; xwshu@ahnu.edu.cn; 9.Purple Mountain Observatory, Chinese Academy of Sciences, 10 Yuan Hua Road, Qixia District, Nanjing 210023, People’s Republic of China; 10.National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, People’s Republic of China |
| 推荐引用方式 GB/T 7714 | Zhang, Zhumao,Shu, Xinwen,Yang, Lei,et al. Discovery of a Years-delayed Radio Flare from an Unusually Slowly Evolving Tidal Disruption Event Candidate[J]. ASTROPHYSICAL JOURNAL,2026,997(1). |
| APA | Zhang, Zhumao.,Shu, Xinwen.,Yang, Lei.,Sun, Luming.,Ding, Hucheng.,...&Wang, Tinggui.(2026).Discovery of a Years-delayed Radio Flare from an Unusually Slowly Evolving Tidal Disruption Event Candidate.ASTROPHYSICAL JOURNAL,997(1). |
| MLA | Zhang, Zhumao,et al."Discovery of a Years-delayed Radio Flare from an Unusually Slowly Evolving Tidal Disruption Event Candidate".ASTROPHYSICAL JOURNAL 997.1(2026). |
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来源：云南天文台
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