2010/01/31 by A. A. Grib, Yu. V. Pavlov · 111 citations
Physics and Astronomy · #Angular momentum #Astrophysical Phenomena and Observations #Astrophysics #Astrophysics and Cosmic Phenomena #Atomic physics #Auger #Binary black hole #Black hole (networking) #Charged black hole #Classical mechanics #Collision #Extremal black hole #Field (mathematics) #Gravitation #Gravitational energy #Gravitational field #Gravitational wave #Hawking radiation #Micro black hole #Particle (ecology) #Penrose process #Physics #Pulsars and Gravitational Waves Research #Quantum electrodynamics #Quantum mechanics #Rotating black hole #Scattering #Schwarzschild radius #Spin-flip #Stellar black hole #astro-ph.HE #gr-qc #hep-ph #hep-th
paper · pdf · doi:10.1016/j.astropartphys.2010.12.005
published in Astroparticle Physics 34(7), 581-586 (Elsevier BV) · LaTeX, 7 pages, 2 figures
openalex publication_date 2010/12/22 · arxiv created 2011/01/30 · arxiv updated 2011/02/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Scattering of particles in the gravitational field of Kerr black holes is considered. It is shown that scattering energy of particles in the centre of mass system can obtain very large values not only for extremal black holes but also for nonextremal ones existing in Nature. This can be used for explanation of still unresolved problem of the origin of ultrahigh energy cosmic rays observed in Auger experiment. Extraction of energy after the collision is investigated. It is shown that due to the Penrose process the energy of the particle escaping the hole at infinity can be large. Contradictions in the problem of getting high energetic particles escaping the black hole are resolved.