https://doi.org/10.1140/epjc/s10052-023-11691-9
Regular Article - Theoretical Physics
Charged particles and Penrose process near charged black holes in Einstein–Maxwell-scalar theory
1
Ulugh Beg Astronomical Institute, Astronomy str. 33, 100052, Tashkent, Uzbekistan
2
Institute of Fundamental and Applied Research, National Research University TIIAME, Kori Niyoziy 39, 100000, Tashkent, Uzbekistan
3
Akfa University, Milliy Bog Str. 264, 111221, Tashkent, Uzbekistan
4
National University of Uzbekistan, Tashkent, Uzbekistan
5
Tashkent State Technical University, 100095, Tashkent, Uzbekistan
6
School of Mathematics and Natural Sciences, New Uzbekistan University, Mustaqillik Ave. 54, 100007, Tashkent, Uzbekistan
7
Institute of Nuclear Physics, Ulugbek 1, 100214, Tashkent, Uzbekistan
8
Henan Academy of Big Data/School of Mathematics and Statistics, Zhengzhou University, 450001, Zhengzhou, China
Received:
9
May
2023
Accepted:
3
June
2023
Published online:
14
June
2023
We study the dynamics of charged test particles around an electrically charged black hole in Einstein–Maxwell-scalar (EMS) gravity. The event horizon properties of the spacetime around the black hole are explored and the upper limit for the EMS theory parameters corresponding to extreme charge and minimal value of the event horizon are found. The effective potential for the radial motion of the charged particles at the equatorial plane is investigated. Specific energy and angular momentum of the particles corresponding to circular stable orbits are also studied. We also investigate the effects of the EMS parameter and the black hole charge on innermost stable circular orbits (ISCOs). We also investigate synchrotron radiation of charged particles in the spacetime of the charged black hole in EMS gravity. We also explore electric Penrose and Bañados–Silk–West processes near the black hole horizon, where we analyse in detail the effects of EMS parameters on energy efficiency in the Penrose process and critical angular momentum that allows colliding particles near the horizon, together with the center of mass energy in charged particles collisions.
© The Author(s) 2023
Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.
Funded by SCOAP3. SCOAP3 supports the goals of the International Year of Basic Sciences for Sustainable Development.
