SHAYMATOV, Sanjar, Jaroslav VRBA, Daniele MALAFARINA, Bobomurat AHMEDOV and Zdeněk STUCHLÍK. Charged particle and epicyclic motions around 4D Einstein-Gauss-Bonnet black hole immersed in an external magnetic field. PHYSICS OF THE DARK UNIVERSE. 2020, vol. 30, December 2020, p. "100648-1"-"100648-10", 10 pp. ISSN 2212-6864. Available from: https://dx.doi.org/10.1016/j.dark.2020.100648.
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Basic information
Original name Charged particle and epicyclic motions around 4D Einstein-Gauss-Bonnet black hole immersed in an external magnetic field
Authors SHAYMATOV, Sanjar, Jaroslav VRBA (203 Czech Republic, belonging to the institution), Daniele MALAFARINA, Bobomurat AHMEDOV (860 Uzbekistan) and Zdeněk STUCHLÍK (203 Czech Republic, belonging to the institution).
Edition PHYSICS OF THE DARK UNIVERSE, 2020, 2212-6864.
Other information
Original language English
Type of outcome Article in a journal
Field of Study 10308 Astronomy
Country of publisher Netherlands
Confidentiality degree is not subject to a state or trade secret
WWW URL
RIV identification code RIV/47813059:19630/20:A0000057
Organization unit Institute of physics in Opava
Doi http://dx.doi.org/10.1016/j.dark.2020.100648
UT WoS 000595916100011
Keywords in English Einstein-Gauss-Bonnet (EGB) black hole
Tags FÚ, FÚ2020, RIV21
Tags International impact, Reviewed
Changed by Changed by: Mgr. Pavlína Jalůvková, učo 25213. Changed: 26/4/2022 18:52.
Abstract
We investigate particle motion in the vicinity of a 4D Einstein-Gauss-Bonnet (EGB) black hole immersed in external asymptotically uniform magnetic field. It is well known that magnetic fields can strongly affect charged particle motion in the black hole vicinity due to the Lorenz force. We find that the presence of the Gauss-Bonnet (GB) coupling gives rise to a similar effect, reducing the radius of the innermost stable circular orbit (ISCO) with respect to the purely relativistic Schwarzschild black hole. Further, we consider particle collisions in the black hole vicinity to determine the center of mass energy and show that this energy increases with respect to the Schwarzschild case due to the effect of the GB term. Finally, we consider epicyclic motion and its frequencies and resonance as a mean to test the predictions of the model against astrophysical observations. In particular we test which values of the parameters of the theory best fit the 3:2 resonance of high-frequency quasi-periodic oscillations in three low-mass X-ray binaries.
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