Electric Penrose process: High-energy acceleration of ionized particles by nonrotating weakly charged black hole

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F47813059%3A19630%2F21%3AA0000108" target="_blank" >RIV/47813059:19630/21:A0000108 - isvavai.cz</a>
Result on the web
<a href="https://journals.aps.org/prd/abstract/10.1103/PhysRevD.104.084099" target="_blank" >https://journals.aps.org/prd/abstract/10.1103/PhysRevD.104.084099</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1103/PhysRevD.104.084099" target="_blank" >10.1103/PhysRevD.104.084099</a>

Result language
angličtina
Original language name
Electric Penrose process: High-energy acceleration of ionized particles by nonrotating weakly charged black hole
Original language description
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-Nordstrom 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 ultrahigh 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 center supermassive black hole is capable to act as a PeVatron of protons. The presented mechanism can serve as a simple toy model of a nonrotating compact object acting as a particle accelerator with a potential astrophysical implementations related to the cosmic ray physics and beyond.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10308 - Astronomy (including astrophysics,space science)

Project
<a href="/en/project/GA19-03950S" target="_blank" >GA19-03950S: Testing strong gravity via black holes</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2021
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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