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We propose a model to explain the time delay between the peak of the optical and X-ray luminosity, \dt hereafter, in UV/optically-selected tidal disruption events (TDEs). The following picture explains the observed \dt in several TDEs as a…

High Energy Astrophysical Phenomena · Physics 2021-11-03 Kimitake Hayasaki , Peter G. Jonker

A star crossing the tidal radius of a supermassive black hole will be spectacularly ripped apart with an accompanying burst of radiation. A few tens of such tidal disruption events (TDEs) have now been identified in the optical wavelengths,…

Three recent global simulations of tidal disruption events (TDEs) have produced, using different numerical techniques and parameters, very similar pictures of their dynamics. In typical TDEs, after the star is disrupted by a supermassive…

High Energy Astrophysical Phenomena · Physics 2025-03-04 Julian Krolik , Tsvi Piran , Taeho Ryu

Extreme tidal disruption events (eTDEs), which occur when a star passes very close to a supermassive black hole, may provide a way to observe a long-sought general relativistic effect: orbits that wind several times around a black hole and…

High Energy Astrophysical Phenomena · Physics 2023-04-05 Taeho Ryu , Julian Krolik , Tsvi Piran

Tidal disruption events (TDEs) are expected to release much of their energy in the far-ultraviolet (UV), which we do not observe directly. However, infrared (IR) observations can observe re-radiation of the optical/UV emission from dust,…

Tidal disruption events (TDEs) occur when a star or sub-stellar object passes close enough to a galaxy's supermassive black hole to be disrupted by tidal forces. NGC 4845 (d=17 Mpc) was host to a TDE, IGR J12580+0134, detected in November…

Tidal disruption events (TDEs) are transient, multi-wavelength events in which a star is ripped apart by a supermassive black hole. Observations show that in a small fraction of TDEs, a short-lived, synchrotron emitting jet is produced. We…

Tidal disruption events which repeat on timescales of months-to-years represent an unambiguous signature of a partial disruption, with the surviving stellar remnant returning to pericentre to be repeatedly stripped by tidal forces. These…

High Energy Astrophysical Phenomena · Physics 2026-02-24 Andrew Mummery

The early time emission in tidal disruption events (TDEs) originates from both accretion and shocks, which produce photons that eventually emerge from an inhomogeneous photosphere. In this work, we model the disk formation following the…

High Energy Astrophysical Phenomena · Physics 2025-12-16 Xiaoshan Huang , Maria Renee Meza , Sol Bin Yun , Brenna Mockler , Shane W. Davis , Yan-fei Jiang

We perform the first systematic study of the minute-to-hours-timescale stochastic variability observed in the X-ray luminosity of tidal disruption events (TDEs) using XMM-Newton data and Fourier analysis methods. We measure the spectral…

High Energy Astrophysical Phenomena · Physics 2026-02-20 Joheen Chakraborty , Megan Masterson , Andrew Mummery , Erin Kara , Christos Panagiotou , Riccardo Arcodia , Vera Berger

Elliptical accretion disk models for tidal disruption events (TDEs) have been recently proposed and independently developed by two groups. Although these two models are characterized by a similar geometry, their physical properties differ…

High Energy Astrophysical Phenomena · Physics 2021-03-03 Fukun Liu , Chunyang Cao , Marek A. Abramowicz , Maciek Wielgus , Rong Cao , Zhiqin Zhou

We report the detection of a significant infrared variability of the nearest tidal disruption event (TDE) ASASSN-14li using Wide-field Infrared Survey Explorer} and newly released Near-Earth Object WISE Reactivation} data. In comparison…

High Energy Astrophysical Phenomena · Physics 2016-09-08 Ning Jiang , Liming Dou , Tinggui Wang , Chenwei Yang , Jianwei Lyu , Hongyan Zhou

Tidal disruption events (TDE) in which a star is devoured by a massive black hole at a galac- tic center pose a challenge to our understanding of accretion processes. Within a month the accretion rate reaches super-Eddington levels. It then…

High Energy Astrophysical Phenomena · Physics 2015-08-19 Tsvi Piran , Aleksander Sadowski , Alexander Tchekhovskoy

The study of the evolution of X-ray spectra in tidal disruption events (TDEs) is an important approach for understanding the physical processes occurring near a supermassive black hole. Observations show that the X-ray spectra of TDEs are…

High Energy Astrophysical Phenomena · Physics 2026-03-12 Wei Chen , Erlin Qiao

Stream-stream collision may be an important pre-peak energy dissipation mechanism in tidal disruption events (TDEs). We perform local three-dimensional radiation hydrodynamic simulations in a wedge geometry including the gravity to study…

High Energy Astrophysical Phenomena · Physics 2023-08-16 Xiaoshan Huang , Shane W. Davis , Yan-fei Jiang

We present a systematic analysis of the X-ray emission of a sample of 17 optically selected, X-ray-detected tidal disruption events (TDEs) discovered between 2014 and 2021. The X-ray light curves show a diverse range of temporal behaviors,…

High Energy Astrophysical Phenomena · Physics 2024-04-09 Muryel Guolo , Suvi Gezari , Yuhan Yao , Sjoert van Velzen , Erica Hammerstein , S. Bradley Cenko , Yarone M. Tokayer

We present X-ray, UV, optical, and radio observations of the nearby ($\approx78$ Mpc) tidal disruption event (TDE) AT2021ehb/ZTF21aanxhjv during its first 430 days of evolution. AT2021ehb occurs in the nucleus of a galaxy hosting a $\approx…

We report the discovery of tidal disruption event (TDE) WFST250820mmsw/AT2025wet by the 2.5-meter Wide Field Survey Telescope (WFST). It exhibits a blue nuclear flare throughout the observed evolution with a g-band peak magnitude ~22, which…