MG14 - Talk detail |
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Participant |
Zaslavskii, Oleg | |||||||
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Institution |
Kharkov V. N. Karazin National University - Svoboda Square 4 Kharkov 61022 Ukraine - Kharkov - Kharkov region - Ukraine | |||||||
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Session |
PS |
Accepted |
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Order |
Time |
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Talk |
Oral abstract |
Title |
Ultra-high energy particle collisions near black holes (review) | |||||
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Abstract |
A brief review of the effect of acceleration of particles by rotating and charged black holes to unbound energies in the centre of mass frame is suggested. Simple and general explanations of the effect are given: (i) the kinematic one based on the behaviour of relative velocity of colliding particles near the horizon, (ii) the geometric one, based on properties of particles' four-velocities with respect to a local light cone near the horizon. The similar effect near the inner black hole horizon is also discussed and the role of the bifurcation point is revealed. We also consider which energies can be detected by an observer at infinity. The possible role of gravitational radiation is discussed. Collisions in the magnetic field and near multi-black hole configurations are discussed. Alternative mechanisms due to collisions inside ergosphere are considered. |
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Pdf file |
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