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Tidal disruptions by supermassive black holes - Hydrodynamic evolution of stars on a Schwarzschild background

1993; IOP Publishing; Volume: 410; Linguagem: Inglês

10.1086/186885

1538-4357

Pablo Laguna, Warner A. Miller, Wojciech H. Zurek, M. B. Davies,

Mechanics and Biomechanics Studies

view Abstract Citations (108) References (16) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Tidal Disruptions by Supermassive Black Holes: Hydrodynamic Evolution of Stars on a Schwarzschild Background Laguna, Pablo ; Miller, Warner A. ; Zurek, Wojciech H. ; Davies, Melvyn B. Abstract We present a three-dimensional numerical study of tidal disruption of a main-sequence star by a supermassive black hole. The simulations include general relativistic effects which are important in this regime. We analyze stars in a marginally bound orbit around the black hole with pericentric separation of a few Schwarzschild radii. We show that during a close passage, as a result of relativistic effects analogous to the perihelion shift, the trajectories of the debris of the star fan out into a crescent-like shape centered on the black hole. We also discuss the increase of the central density of the star as it approaches pericentric distance, the fraction of the debris accreted by the hole, its accretion rate, the distribution of debris orbits bound to the hole, and the velocity of unbound ejected material. We compare these results with the disruption of the star by a Newtonian point mass. Publication: The Astrophysical Journal Pub Date: June 1993 DOI: 10.1086/186885 Bibcode: 1993ApJ...410L..83L Keywords: Black Holes (Astronomy); Hydrodynamic Equations; Schwarzschild Metric; Stellar Evolution; Quasars; Relativity; Tides; Astrophysics; BLACK HOLE PHYSICS; HYDRODYNAMICS; METHODS: NUMERICAL; RELATIVITY full text sources ADS | data products SIMBAD (2)