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 AT2023lli, and found a remarkable month-long bump in its UV/optical light curve nearly two 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-meter Wide Field Survey Telescope (WFST).
Spoon-Feeding Giant Stars to Supermassive Black Holes: Episodic Mass Transfer from Evolving Stars and Their Contribution to the Quiescent Activity of Galactic Nuclei
NTT, Spitzer and Chandra spectroscopy of SDSSJ095209.56+214313.3: the most luminous coronal-line supernova ever observed, or a stellar tidal disruption event ?
The Tidal Disruption Event AT 2018hyz II: Light Curve Modeling of a Partially Disrupted Star
AT 2018 hyz（=ASASSN-18 zj）是一个位于静止E+A星系核心的潮汐破裂事件（TDE），红移为$z = 0.04573$，首次由全天超新星自动巡天（ASAS-SN）发现。我们提出了瞬态的光学+UV测光，以及X射线光谱和无线电上限。AT 2018 hyz的辐射热光变曲线与其他已知的TDE相当，并且在早期以与$t^{-5/3}$一致的速率下降，发射出$E = 9\times10^{50}$ erg的总辐射能量。在辐射热峰值后约50天，紫外光曲线出现一个过度的凸起，然后在250天后出现一个平坦化。光变曲线显示，在辐射热峰值之后约50天，紫外线中出现了一个过度的凸起，持续了至少100天，这可能与外流有关。我们探测到一个持续存在至少86天的X射线源。X射线光谱显示总未吸收通量为$\sim 4\times10^{-14}$ erg cm $^{-2}$ s $^{-1}$，并且最佳拟合为黑体加幂律模型，光子指数为$Γ= 0.8$。热X射线模型无法解释光子$> 1$ keV，而无线电非探测有利于逆康普顿散射，而不是非热分量的射流。我们使用模块化的开放源滤波器瞬态（MOSFiT）的光学和紫外光曲线模型，并找到一个最适合的黑洞的$5.2\times10^6$ M $_\odot$部分破坏$0.1$ M $_\odot$明星（剥离质量$\sim 0.01$ M $_\odot$推断的…
IGR J12580+0134: A Possible Repeated Partial Tidal Disruption Event Inferred from Late-Time Radio Re-brightenin
Huazhong University of Science and Technology（华中科技大学）；Shanghai Astronomical Observatory, Chinese Academy of Sciences（中国科学院上海天文台）；Purple Mountain Observatory, Chinese Academy of Sciences（中国科学院紫金山天文台）；University of Science and Technology of China（中国科学技术大学）
Stellar Tidal Disruptions by Newborn Neutron Stars or Black Holes: A Mechanism for Hydrogen-poor (Super)luminous Supernovae and Fast Blue Optical Transients
ATLAS22kjn (AT 2022fpx): A Coronal Line Emitter with an Early Light Curve Bump and Mid-Infrared Dust Echo
University of Illinois（伊利诺伊大学）；Institute for Astronomy, University of Hawai‘i（夏威夷大学天文研究所）；School of Physics, University of Melbourne（墨尔本大学物理学院）；The Ohio State University（俄亥俄州立大学）；Texas Tech University（德克萨斯理工大学）；Peking University（北京大学）；National Astronomical Observatories, Chinese Academy of Science（中国科学院国家天文台）
A tidal disruption event in a quasar at redshift 7.19
University of Toronto（多伦多大学）；Dunlap Institute for Astronomy and Astrophysics, University of Toronto（多伦多大学邓普天文学与天体物理研究所）；Cosmic Dawn Center (DAWN)（宇宙黎明中心）；Niels Bohr Institute, University of Copenhagen（哥本哈根大学尼尔斯·玻尔研究所）；Kavli Institute for Astronomy and Astrophysics, Peking University（北京大学科维理天文与天体物理研究所）；Department of Astronomy, School of Physics, Peking University（北京大学物理学院天文学系）；The University of Texas at Austin（德克萨斯大学奥斯汀分校）；Max-Planck-Institut für extraterrestrische Physik（马克斯·普朗克地外物理学研究所）
Aarmed with Data: Bumps, Outflows, and Disk-like Emission in TDE 2025aarm
University of Arizona（亚利桑那大学）；Queen’s University Belfast（贝尔法斯特女王大学）；Institute of Space Sciences (ICE-CSIC)（空间科学研究所（ICE-CSIC））；The University of Texas at Austin（德克萨斯大学奥斯汀分校）；Tel Aviv University（特拉维夫大学）；Technical University of Denmark（丹麦技术大学）；Gemini Observatory（双子座天文台）
A Torus Remnant Revealed by the Infrared Echo of Tidal Disruption Event AT 2019qiz: Implications for the Missing Energy and Quasiperiodic Eruption Formation
Sub-relativistic Outflow and Hours-Timescale Large-amplitude X-ray Dips during Super-Eddington Accretion onto a Low-mass Massive Black Hole in the Tidal Disruption Event AT2022lri
A Parsec-Scale Transient High-Frequency-Peaked Radio Source in the Very Large Array Sky Survey Brightening and Fading over a Decadal Timescale
David A. Dunlap Department of Astronomy & Astrophysics, University of Toronto（多伦多大学戴维·A·邓普天文学与天体物理学系）；Dunlap Institute for Astronomy & Astrophysics, University of Toronto（多伦多大学邓普天文学与天体物理学研究所）；Department of Astronomy and Astrophysics, University of California, Santa Cruz（加州大学圣克鲁兹分校天文学与天体物理学系）；National Radio Astronomy Observatory（美国国家射电天文台）
