Charged particle and epicyclic motions around 4D
Einstein-Gauss-Bonnet black hole immersed in an external
magnetic field

J 2020

Charged particle and epicyclic motions around 4D Einstein-Gauss-Bonnet black hole immersed in an external magnetic field

SHAYMATOV, Sanjar, Jaroslav VRBA, Daniele MALAFARINA, Bobomurat AHMEDOV, Zdeněk STUCHLÍK et. al.

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

Language

English

Type of outcome

Článek v odborném periodiku

Field of Study

10308 Astronomy

Country of publisher

Netherlands

Confidentiality degree

není předmětem státního či obchodního tajemství

References:

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

Abstract

V originále

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.

Citovat

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.

@article{49124,
   author = {Shaymatov, Sanjar and Vrba, Jaroslav and Malafarina, Daniele and Ahmedov, Bobomurat and Stuchlík, Zdeněk},
   article_number = {December 2020},
   doi = {http://dx.doi.org/10.1016/j.dark.2020.100648},
   keywords = {Einstein-Gauss-Bonnet (EGB) black hole},
   language = {eng},
   issn = {2212-6864},
   journal = {PHYSICS OF THE DARK UNIVERSE},
   title = {Charged particle and epicyclic motions around 4D Einstein-Gauss-Bonnet black hole immersed in an external magnetic field},
   url = {https://www.sciencedirect.com/science/article/pii/S2212686420302703},
   volume = {30},
   year = {2020}
}

TY  - JOUR
ID  - 49124
AU  - Shaymatov, Sanjar - Vrba, Jaroslav - Malafarina, Daniele - Ahmedov, Bobomurat - Stuchlík, Zdeněk
PY  - 2020
TI  - Charged particle and epicyclic motions around 4D Einstein-Gauss-Bonnet black hole immersed in an external magnetic field
JF  - PHYSICS OF THE DARK UNIVERSE
VL  - 30
IS  - December 2020
SP  - "100648-1"-"100648-10"
EP  - "100648-1"-"100648-10"
SN  - 22126864
KW  - Einstein-Gauss-Bonnet (EGB) black hole
UR  - https://www.sciencedirect.com/science/article/pii/S2212686420302703
N2  - 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.
ER  -

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. \textit{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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