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Weakly magnetized black holes as particle accelerators
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We study collision of particles in the vicinity of a horizon of a weakly magnetized non-rotating black hole. In the presence of the magnetic field innermost stable circular orbits (ISCO) of charged particles can be located close to the horizon. We demonstrate that for a collision of two particles, one of which is charged and revolving at ISCO and the other is neutral and falling from infinity, the maximal collision energy can be high in the limit of strong magnetic field. This effect has some similarity with the recently discussed effect of high center-of-mass energy for collision of particles in extremely rotating black holes. We also demonstrate that for `realistic' astrophysical black holes their ability to play the role of `accelerators' is in fact quite restricted.
Forward citations
Cited by 2 Pith papers
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Ultra-High-Energy Particle Production in Binary Mergers Endowed with Magnetic Fields
Using a magnetized Kerr spacetime, the authors compute that binary merger remnants can yield proton collision energies up to 10^20 eV, proposing them as UHECR sources.
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Influence of external magnetic fields on charged particle motion around a Schwarzschild-like black hole
The paper derives ISCO radii, collision energies, and QPO frequencies for charged particles around a Schwarzschild-like black hole in an external magnetic field, but the dimensionless equations contain an internal inc...
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