Electric Penrose process: high-energy acceleration of ionized particles by non-rotating weakly charged black hole. (arXiv:2109.10288v1 [gr-qc])
<a href="http://arxiv.org/find/gr-qc/1/au:+Tursunov_A/0/1/0/all/0/1">Arman Tursunov</a>, <a href="http://arxiv.org/find/gr-qc/1/au:+Juraev_B/0/1/0/all/0/1">Bakhtinur Juraev</a>, <a href="http://arxiv.org/find/gr-qc/1/au:+Stuchlik_Z/0/1/0/all/0/1">Zdeněk Stuchlík</a>, <a href="http://arxiv.org/find/gr-qc/1/au:+Kolos_M/0/1/0/all/0/1">Martin Kološ</a>
In many astrophysical scenarios the charge of the black hole is often
neglected due to unrealistically large values of the charge required for the
Reissner-Nordstr”om spacetime metric. However, black holes may possess small
electric charge due to various selective accretion mechanisms. In this paper we
investigate the effect of a small hypothetical electric charge of a
Schwarzschild black hole on the ionization of a freely falling neutral particle
and subsequent escape of the ionized particle from the black hole. We show that
the energy of ionized particle can grow ultra-high and discuss distinguishing
signatures of particle acceleration by weakly charged black holes. We also
discuss a possible application of the proposed mechanism as an alternative
cosmic ray acceleration scenario. In particular we show that the Galactic
centre supermassive black hole is capable to act as a PeVatron of protons. The
presented mechanism can serve as a simple toy model of a non-rotating compact
object acting as a particle accelerator with a potential astrophysical
implementations related to the cosmic ray physics and beyond.
In many astrophysical scenarios the charge of the black hole is often
neglected due to unrealistically large values of the charge required for the
Reissner-Nordstr”om spacetime metric. However, black holes may possess small
electric charge due to various selective accretion mechanisms. In this paper we
investigate the effect of a small hypothetical electric charge of a
Schwarzschild black hole on the ionization of a freely falling neutral particle
and subsequent escape of the ionized particle from the black hole. We show that
the energy of ionized particle can grow ultra-high and discuss distinguishing
signatures of particle acceleration by weakly charged black holes. We also
discuss a possible application of the proposed mechanism as an alternative
cosmic ray acceleration scenario. In particular we show that the Galactic
centre supermassive black hole is capable to act as a PeVatron of protons. The
presented mechanism can serve as a simple toy model of a non-rotating compact
object acting as a particle accelerator with a potential astrophysical
implementations related to the cosmic ray physics and beyond.
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