Exact solutions for spherical gravitational collapse around a black hole:the effect of tangential pressure

被引:0
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作者
赵声贤 [1 ,2 ]
张双南 [1 ,3 ,2 ]
机构
[1] Key Laboratory of Space Astronomy and Technology,National Astronomical Observatories,Chinese Academy of Sciences
[2] University of Chinese Academy of Sciences
[3] Key Laboratory of Particle Astrophysics,Institute of High Energy
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P145.8 [塌缩星(黑洞)];
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摘要
Spherical gravitational collapse towards a black hole with non-zero tangential pressure is studied.Exact solutions corresponding to different equations of state are given.We find that when taking the tangential pressure into account,the exact solutions have three qualitatively different outcomes.For positive tangential pressure,the shell around a black hole may eventually collapse onto the black hole,or expand to infinity,or have a static but unstable solution,depending on the combination of black hole mass,mass of the shell and the pressure parameter.For vanishing or negative pressure,the shell will collapse onto the black hole.For all eventually collapsing solutions,the shell will cross the event horizon,instead of accumulating outside theeventhorizon,even if clocked by a distant stationary observer.
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页码:171 / 177
页数:7
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