AT2021aeuk: A Repeating Partial Tidal Disruption Event Candidate in a Narrow-line Seyfert 1 Galaxy

被引:0
|
作者
Sun, Jingbo [1 ,2 ]
Guo, Hengxiao [1 ]
Gu, Minfeng [1 ]
Li, Ya-Ping [1 ]
Chen, Yongjun [1 ]
Gonzalez-Buitrago, D. [3 ,4 ]
Wang, Jian-Guo [5 ,6 ]
Li, Sha-Sha [5 ,6 ]
Feng, Hai-Cheng [5 ,6 ]
Xiong, Dingrong [5 ,6 ]
Wang, Yanan [7 ]
Yuan, Qi [8 ]
Jin, Jun-jie [7 ]
Zhang, Wenda [7 ]
Deng, Hongping [1 ]
Zhang, Minghao [7 ]
机构
[1] Chinese Acad Sci, Shanghai Astron Observ, 80 Nandan Rd, Shanghai 200030, Peoples R China
[2] Univ Chinese Acad Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China
[3] Univ Nacl Autonoma Mexico, Inst Astron, AP 106, Ensenada 22860, BC, Mexico
[4] Univ Calif Irvine, Dept Phys & Astron, 4129 Frederick Reines Hall, Irvine, CA 92697 USA
[5] Chinese Acad Sci, Yunnan Observ, Kunming 650011, Yunnan, Peoples R China
[6] Chinese Acad Sci, Key Lab Struct & Evolut Celestial Objects, Kunming 650011, Yunnan, Peoples R China
[7] Chinese Acad Sci, Natl Astron Observ, 20A Datun Rd, Beijing 100101, Peoples R China
[8] Chinese Acad Sci, Changchun Observ, Natl Astron Observ, Changchun 130117, Peoples R China
来源
ASTROPHYSICAL JOURNAL | 2025年 / 982卷 / 02期
基金
中国国家自然科学基金; 上海市自然科学基金; 国家重点研发计划;
关键词
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;
D O I
10.3847/1538-4357/adb724
中图分类号
P1 [天文学];
学科分类号
0704 ;
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.
引用
收藏
页数:20
相关论文
共 50 条
  • [21] UCM 2257+2438, A NEW NARROW-LINE SEYFERT-1 GALAXY
    ZAMORANO, J
    GALLEGO, J
    REGO, M
    VITORES, AG
    GONZALEZRIESTRA, R
    ASTRONOMICAL JOURNAL, 1992, 104 (03): : 1000 - 1008
  • [22] Radiative Driving of the AGN Outflows in the Narrow-line Seyfert 1 Galaxy NGC 4051
    Meena, Beena
    Crenshaw, D. Michael
    Schmitt, Henrique R.
    Revalski, Mitchell
    Fischer, Travis C.
    Polack, Garrett E.
    Kraemer, Steven B.
    Dashtamirova, Dzhuliya
    ASTROPHYSICAL JOURNAL, 2021, 916 (01):
  • [23] The optical variability of the narrow-line Seyfert 1 galaxy IRAS 13224-3809
    Young, AJ
    Crawford, CS
    Fabian, AC
    Brandt, WN
    O'Brien, PT
    MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 1999, 304 (04) : L46 - L52
  • [24] Variability of optical FeII complex in narrow-line Seyfert 1 galaxy NGC 4051
    Wang, J
    Wei, JY
    He, XT
    ASTRONOMY & ASTROPHYSICS, 2005, 436 (02) : 417 - 426
  • [25] Evidence for a physically compact narrow-line region in the Seyfert 1 Galaxy NGC 5548
    Kraemer, SB
    Crenshaw, DM
    Filippenko, AV
    Peterson, BM
    ASTROPHYSICAL JOURNAL, 1998, 499 (02): : 719 - 727
  • [26] Detection of a Multiphase Ultrafast Wind in the Narrow-line Seyfert 1 Galaxy Mrk 1044
    Krongold, Y.
    Longinotti, A. L.
    Santos-Lleo, M.
    Mathur, S.
    Peterson, B. M.
    Nicastro, F.
    Gupta, A.
    Rodriguez-Pascual, P.
    Elias-Chavez, M.
    ASTROPHYSICAL JOURNAL, 2021, 917 (01):
  • [27] Probing the ionization structure of the narrow-line region in the Seyfert 1 galaxy NGC 4151
    Kraemer, S. B.
    Schmitt, H. R.
    Crenshaw, D. M.
    ASTROPHYSICAL JOURNAL, 2008, 679 (02): : 1128 - 1143
  • [28] A NEW NARROW-LINE SEYFERT-1 GALAXY - IRAS-1652 + 395
    BASSANI, L
    COE, MJ
    MALKAN, MA
    MANDOLESI, N
    PARTRIDGE, B
    SPINOGLIO, L
    ASTROPHYSICAL JOURNAL, 1989, 344 (02): : 726 - 733
  • [29] Multifrequency studies of the narrow-line Seyfert 1 galaxy SBS 0846+513
    D'Ammando, F.
    Orienti, M.
    Finke, J.
    Raiteri, C. M.
    Angelakis, E.
    Fuhrmann, L.
    Giroletti, M.
    Hovatta, T.
    Karamanavis, V.
    Max-Moerbeck, W.
    Myserlis, I.
    Readhead, A. C. S.
    Richards, J. L.
    MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2013, 436 (01) : 191 - 201
  • [30] A new narrow-line Seyfert 1 galaxy: RX J1236.9+2656
    Dewangan, GC
    Singh, KP
    Szkody, P
    Hoard, DW
    ASTRONOMY & ASTROPHYSICS, 2000, 360 (01) : 107 - 110