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Stars that plunge into the center of a galaxy are tidally perturbed by a supermassive black hole (SMBH), with closer encounters resulting in larger perturbations. Exciting these tides comes at the expense of the star's orbital energy, which…

High Energy Astrophysical Phenomena · Physics 2023-01-18 M. Cufari , C. J. Nixon , Eric R. Coughlin

Tidal disruption events (TDE) occur when a star ventures too close to a massive black hole. In a partial TDE (pTDE), the star only grazes the tidal radius, causing the outer envelope of the star to be stripped away while the stellar core…

High Energy Astrophysical Phenomena · Physics 2024-12-05 Jin-Hong Chen , Lixin Dai , Shang-Fei Liu , Jian-Wen Ou

Tidal disruption of stars in dense nuclear star clusters containing supermassive central black holes (SMBH) is modeled by high-accuracy direct N-body simulation. Stars getting too close to the SMBH are tidally disrupted and a tidal…

Astrophysics of Galaxies · Physics 2022-07-20 Shiyan Zhong , Shuo Li , Peter Berczik , Rainer Spurzem

Stars orbiting supermassive black holes can generate recurring accretion flares in repeating partial tidal disruption events (TDEs). Here we develop an efficient formalism for analyzing the time-dependent response of a star to the removal…

High Energy Astrophysical Phenomena · Physics 2025-05-20 Ananya Bandopadhyay , Eric R. Coughlin , C. J. Nixon

In the centers of galaxies, stars that orbit supermassive black hole binaries (SMBHBs) can undergo tidal disruptions due to the Lidov-Kozai mechanism. Nevertheless, most previous researches have predominantly focused on full tidal…

High Energy Astrophysical Phenomena · Physics 2024-03-05 Xiao-Jun Wu , Ye-Fei Yuan , Yan Luo , Wenbin Lin

In the centers of dense star clusters, close encounters between stars and compact objects are likely to occur. We study tidal disruption events of main-sequence (MS) stars by stellar-mass black holes (termed $\mu$TDEs), which can shed light…

High Energy Astrophysical Phenomena · Physics 2024-05-08 Pavan Vynatheya , Taeho Ryu , Ruediger Pakmor , Selma E. de Mink , Hagai B. Perets

A number of candidate repeating partial tidal disruption events (rpTDEs) have been reported in recent years. If these events are confirmed, the high fraction of observed rpTDEs among all tidal disruption events (TDEs) is in tension with…

High Energy Astrophysical Phenomena · Physics 2026-04-09 Zhen Pan , Dong Lai

Stars grazing supermassive black holes on bound orbits may produce periodic flares over many passages, known as repeating partial tidal disruption events (TDEs). Here, we present 3D hydrodynamic simulations of sun-like stars over multiple…

High Energy Astrophysical Phenomena · Physics 2024-12-30 Chang Liu , Ricardo Yarza , Enrico Ramirez-Ruiz

In dense star clusters, such as globular and open clusters, dynamical interactions between stars and black holes (BHs) can be extremely frequent, leading to various astrophysical transients. Close encounters between a star and a stellar…

High Energy Astrophysical Phenomena · Physics 2021-03-31 Yi-Han Wang , Rosalba Perna , Philip J. Armitage

A star entering the tidal sphere of a supermassive black hole (SMBH) can be partially stripped of mass, resulting in a partial tidal disruption event (TDE). Here we develop an analytical model for properties of these events, including the…

High Energy Astrophysical Phenomena · Physics 2026-01-07 Ananya Bandopadhyay , Eric R. Coughlin , C. J. Nixon

Tidal disruption events (TDEs) of giant stars by supermassive black holes (SMBH) differ significantly from those of main sequence ones. Most (all for SMBH of more than a~ few times 10^5 m_\odot) giant-TDEs are partial: only a fraction of…

High Energy Astrophysical Phenomena · Physics 2024-11-26 Nuria Navarro Navarro , Tsvi Piran

The structure of stars orbiting close to supermassive black holes (SMBHs) can be dramatically modified by tidal heating, which can in principle dissipate an energy much larger than the stellar binding energy. We use analytic models and MESA…

High Energy Astrophysical Phenomena · Physics 2025-05-19 Philippe Z. Yao , Eliot Quataert

In nuclei of galaxies strong tidal forces can destroy stars passing within a critical distance from the central super-massive black hole (SMBH). Observational signatures of tidal disruption events (TDEs) depend on the environment around the…

High Energy Astrophysical Phenomena · Physics 2019-10-29 Marcel Stolc , Vladimir Karas

This paper introduces a series of papers presenting a quantitative theory for the tidal disruption of main sequence stars by supermassive black holes. Using fully general relativistic hydrodynamics simulations and MESA-model initial…

High Energy Astrophysical Phenomena · Physics 2020-12-02 Taeho Ryu , Julian Krolik , Tsvi Piran , Scott C. Noble

When a star approaches a black hole closely, it may be pulled apart by gravitational forces in a tidal disruption event (TDE). The flares produced by TDEs are unique tracers of otherwise quiescent supermassive black holes (SMBHs) located at…

High Energy Astrophysical Phenomena · Physics 2019-05-17 Felipe G. Goicovic , Volker Springel , Sebastian T. Ohlmann , Ruediger Pakmor

Once per 10,000-100,000 years, an unlucky star may experience a close encounter with a supermassive black hole (SMBH), partially or fully tearing apart the star in an exceedingly brief, bright interaction called a tidal disruption event…

Solar and Stellar Astrophysics · Physics 2025-11-07 Rewa Clark Bush , Samantha C. Wu , Rosa Wallace Everson , Ricardo Yarza , Ariadna Murguia-Berthier , Enrico Ramirez-Ruiz

In this paper, the third in this series, we continue our study of tidal disruption events of main-sequence stars by a non-spinning $10^{6}~\rm{M}_\odot$ supermassive black hole. Here we focus on the outcomes of partial disruptions. As the…

Solar and Stellar Astrophysics · Physics 2020-01-14 Taeho Ryu , Julian Krolik , Tsvi Piran , Scott C. Noble

In this paper, the third in this series, we continue our study of tidal disruption events of main-sequence stars by a non-spinning $10^{6}~\rm{M}_\odot$ supermassive black hole. Here we focus on the stellar mass dependence of the outcomes…

High Energy Astrophysical Phenomena · Physics 2020-12-02 Taeho Ryu , Julian Krolik , Tsvi Piran , Scott C. Noble

A repeating partial tidal disruption event (rpTDE) is typically modeled as a star on a bound orbit that is partially disrupted by a massive black hole (MBH) at each pericenter passage. For disruption to occur, the pericenter distance must…

High Energy Astrophysical Phenomena · Physics 2026-05-26 Shu Yan Lau , Ethan McKeever , Hang Yu

Stars approaching supermassive black holes (SMBHs) in the centers of galaxies can be torn apart by strong tidal forces. We study the physics of tidal disruption by a binary SMBH as a function of the binary mass ratio $q = M_2 / M_1$ and…

High Energy Astrophysical Phenomena · Physics 2018-05-02 Siva Darbha , Eric R. Coughlin , Daniel Kasen , Eliot Quataert
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