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 inconsistency.
Particle collisions near static spherically symmetric black holes
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abstract
It has been shown by Ba\~{n}ados, Silk and West (BSW) that the center of mass energy (E_cm) of test particles starting from rest at infinity and colliding near the horizon of a Schwarzschild black hole is always finite. In this communication, we extent the BSW scenario and study two particles with different energies colliding near the horizon of a static spherically symmetric black hole. Surprisingly, we find that even for the static spherically symmetric (i.e., Schwarzschild like) black holes it is possible to obtain an arbitrarily high E cm from the two test particles colliding near the horizon of a black hole, if one fine-tunes the parameters of geodesic motion.
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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 inconsistency.