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Related papers: Elevated Rates of Tidal Disruption Events in Activ…

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A fraction of tidal disruption events (TDEs) occur in active galactic nuclei (AGNs) whose black holes possess accretion disks; these TDEs can be confused with common AGN flares. The disruption itself is unaffected by the disk, but the…

High Energy Astrophysical Phenomena · Physics 2020-01-24 Chi-Ho Chan , Tsvi Piran , Julian H. Krolik , Dekel Saban

Tidal Disruption Events (TDEs) are routinely observed in quiescent galaxies, as stars from the nuclear star cluster are scattered into the loss cone of the central supermassive black hole (SMBH). TDEs are also expected to occur in Active…

High Energy Astrophysical Phenomena · Physics 2024-05-24 Chaitanya Prasad , Yihan Wang , Rosalba Perna , K. E. Saavik Ford , Barry McKernan

Tidal disruption events\,(TDEs) provide a valuable probe in studying the dynamics of stars in the nuclear environments of galaxies. Recent observations show that TDEs are strongly overrepresented in post-starburst or "green valley"…

High Energy Astrophysical Phenomena · Physics 2024-01-01 Mengye Wang , Yiqiu Ma , Qingwen Wu , Ning Jiang

Stars embedded in active galactic nucleus (AGN) disks or captured by them may scatter onto the supermassive black hole (SMBH), leading to a tidal disruption event (TDE). Using the moving-mesh hydrodynamics simulations with {\small AREPO},…

High Energy Astrophysical Phenomena · Physics 2023-10-03 Taeho Ryu , Barry McKernan , Saavik Ford , Matteo Cantiello , Matthew Graham , Daniel Stern , Nathan W. C Leigh

Active galactic nuclei (AGNs) can act as black hole assembly lines, funneling some of the stellar-mass black holes from the vicinity of the galactic center into the inner plane of the AGN disk where the black holes can merge through…

High Energy Astrophysical Phenomena · Physics 2022-07-27 Y. Yang , I. Bartos , G. Fragione , Z. Haiman , M. Kowalski , S. Marka , R. Perna , H. Tagawa

Recent observations of changing-look active galactic nuclei (AGN) hint at a frequency of accretion activity not fully explained by tidal disruption events (TDEs) stemming from relaxation processes in nucleus star clusters (NSCs),…

High Energy Astrophysical Phenomena · Physics 2023-10-03 Yihan Wang , Douglas N. C. Lin , Bing Zhang , Zhaohuan Zhu

One of the main challenges of current tidal disruption events (TDEs) studies is that emission arising from AGN activity may potentially mimic the expected X-ray emission of a TDE. Here we compare the X-ray properties of TDEs and AGN to…

High Energy Astrophysical Phenomena · Physics 2018-04-27 Katie Auchettl , Enrico Ramirez-Ruiz , James Guillochon

Tidal disruption events (TDEs) in active galactic nuclei (AGNs) mark a regime where traditional vacuum models fail to capture the full dynamics, especially due to interaction between stellar debris and pre-existing accretion disks. We…

High Energy Astrophysical Phenomena · Physics 2025-10-10 Minghao Zhang , Wenda Zhang , Hongping Deng , Hengxiao Guo , Jingbo Sun

We explore the contributions of Tidal Disruption Events (TDEs) to the flares in Active Galactic Nuclei (AGN) at high redshifts. Using the latest data available from X-ray and optical observations of high-redshift galaxies, in combination…

Astrophysics of Galaxies · Physics 2021-12-08 Hamsa Padmanabhan , Abraham Loeb

Tidal disruption event (TDE) rates in active galactic nuclei (AGN) consistently exceed predictions from two-body relaxation, particularly in post-starburst and green valley galaxies. We explain this excess with a new mechanism: a sweeping…

Astrophysics of Galaxies · Physics 2026-04-22 Xiaochen Zheng , Morgan MacLeod , Douglas N. C. Lin , Yi Yang , Zhenzhen Shao

We argue that the `changing look' AGN recently reported by LaMassa et al. could be a luminous flare produced by the tidal disruption of a super-solar mass star passing just a few gravitational radii outside the event horizon of a $\sim 10^8…

High Energy Astrophysical Phenomena · Physics 2015-08-06 A. Merloni , T. Dwelly , M. Salvato , A. Georgakakis , J. Greiner , M. Krumpe , K. Nandra , G. Ponti , A. Rau

Stars can be ripped apart by tidal forces in the vicinity of a massive black hole (MBH), causing luminous flares known as tidal disruption events (TDEs). These events could be contributing to the mass growth of intermediate-mass MBHs, and…

High Energy Astrophysical Phenomena · Physics 2024-09-18 M. Polkas , S. Bonoli , E. Bortolas , D. Izquierdo-Villalba , A. Sesana , L. Broggi , N. Hoyer , D. Spinoso

We explore the rates of tidal disruption events (TDEs) of stars by supermassive black holes (SBHs) in galactic nuclei formed in mergers followed by a formation and coalescence of a binary SBH. Such systems initially have a deficit of stars…

Astrophysics of Galaxies · Physics 2016-11-09 Kirill Lezhnin , Eugene Vasiliev

We present a review of the topics of X-ray stellar tidal disruption events (TDEs) and changing-look active galactic nuclei (AGN). Stars approaching a supermassive black hole (SMBH) can be tidally disrupted and accreted. TDEs were first…

High Energy Astrophysical Phenomena · Physics 2023-05-24 S. Komossa , D. Grupe

The tidal disruption of a star by a massive black hole (MBH) is thought to produce a transient luminous event. Such tidal disruption events (TDEs) may play an important role in the detection and characterization of MBHs and probe the…

Astrophysics of Galaxies · Physics 2016-06-08 Danor Aharon , Alessandra Mastrobuono Battisti , Hagai B. Perets

Tidal disruption events (TDEs) could be an important growth channel for massive black holes in dwarf galaxies. Theoretical work suggests that the observed active galactic nuclei (AGNs) in dwarf galaxies are predominantly TDE-powered. To…

Astrophysics of Galaxies · Physics 2024-10-04 Joanne Tan , Guang Yang , Jonelle L. Walsh , W. N. Brandt , Bin Luo , Franz E. Bauer , Chien-Ting Chen , Mouyuan Sun , Yongquan Xue

Tidal disruption events (TDEs) taking place in active galactic nuclei (AGNs) are different from ordinary TDEs. In these events, the returning tidal debris stream drills through the pre-existing AGN accretion disk near the stream pericenter,…

High Energy Astrophysical Phenomena · Physics 2022-01-10 Chi-Ho Chan , Tsvi Piran , Julian H. Krolik

Tidal disruption events (TDEs) are typically discovered in previously quiescent galaxies. However, earlier studies have revealed a handful of TDEs occurring in pre-existing active galactic nuclei (AGNs). We discuss AT2019aalc, a promising…

Astrophysics of Galaxies · Physics 2025-12-12 Patrik Milán Veres

Nuclear star clusters (NSCs), made up of a dense concentrations of stars and the compact objects they leave behind, are ubiquitous in the central regions of galaxies, surrounding the central supermassive black hole (SMBH). Close…

High Energy Astrophysical Phenomena · Physics 2024-03-28 Taeho Ryu , Rosalba Perna , Matteo Cantiello

In the manuscript, effects of Tidal Disruption Events (TDEs) are estimated on long-term AGN variability, to provide interesting clues to detect probable hidden TDEs in normal broad line AGN with apparent intrinsic variability which…

High Energy Astrophysical Phenomena · Physics 2024-02-08 XueGuang Zhang
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