Chaotic exits from a weakly magnetized Schwarzschild black hole. (English) Zbl 1482.83073
Summary: A charged particle kicked from an initial circular orbit around a weakly magnetized Schwarzschild black hole undergoes transient chaotic motion before either getting captured by the black hole or escaping upstream or downstream with respect to the direction of the magnetic field. These final states form basins of attraction in the space of initial states. We provide a detailed numerical study of the basin structure of this initial state space. We find it to possess the peculiar Wada property: each of its basin boundaries is shared by all three basins. Using basin entropy as a measure, we show that uncertainty in predicting the final exit state increases with stronger magnetic interaction. We also present an approximate analytic expression of the critical escape energy for a vertically-kicked charged particle, and discuss how this depends on the strength of the magnetic interaction.
MSC:
| 83C57 | Black holes |
| 83C50 | Electromagnetic fields in general relativity and gravitational theory |
| 78A30 | Electro- and magnetostatics |
| 37D45 | Strange attractors, chaotic dynamics of systems with hyperbolic behavior |
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