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2012

Collisional Penrose process near the horizon of extreme Kerr black holes

Bejger, Michał, Piran, Tsvi, Abramowicz, Marek et al.

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Collisions of particles in black holes' ergospheres may result in an arbitrarily large center of mass energy.

This led recently to the suggestion (Banados et al., 2009) that black holes can act as ultimate particle accelerators.
If the energy of an outgoing particle is larger than the total energy of the infalling particles the energy excess must come from the rotational energy of the black hole and hence this must involve a Penrose process.
However, while the center of mass energy diverges the position of the collision makes it impossible for energetic particles to escape to infinity.

Collisional Penrose process near the horizon of extreme Kerr black holes · Around

Built on

Penrose, R. 1969, Rev. Nuovo Cimento 1, Special No. 252
1969
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Penrose, R., & Floyd, G. R. 1971, Nature, 229, 177
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Bardeen, J. M., Press, W. H., & Teukolsky, S. A. 1972, Astrophys. J. , 178, 347
1972
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Wald, R. M. 1974, Astrophys. J. , 191, 231
1974
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Kovetz, A., & Piran, T. 1975, Nuovo Cimento Lettere, 12, 39
1975
Earlier work this paper cites.

Similar

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Then

Williams, A. J. 2011, Physical Review D, 83, 123004
2011
Later among the works it cites.
Patil, M. Joshi, P. S. 2011, Classical and Quantum Gravity, 28, 235012
2011
Later among the works it cites.
Tchekhovskoy, A., Narayan, R., & McKinney, J. C. 2011, Monthly Notices of the RAS, 418, L79
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Later among the works it cites.
Narayan, R., & McClintock, J. E. 2012, Monthly Notices of the RAS, 419, L69
2012
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