J 2020

Test particle motion around a black hole in Einstein-Maxwell-scalar theory

TURIMOV, Bobur, Javlon RAYIMBAEV, Ahmadjon ABDUJABBAROV, Bobomurat AHMEDOV, Zdeněk STUCHLÍK et. al.

Základní údaje

Originální název

Test particle motion around a black hole in Einstein-Maxwell-scalar theory

Autoři

TURIMOV, Bobur (860 Uzbekistán, domácí), Javlon RAYIMBAEV, Ahmadjon ABDUJABBAROV (860 Uzbekistán), Bobomurat AHMEDOV (860 Uzbekistán) a Zdeněk STUCHLÍK (203 Česká republika, domácí)

Vydání

Physical Review D, US - Spojené státy americké, 2020, 1550-7998

Další údaje

Jazyk

angličtina

Typ výsledku

Článek v odborném periodiku

Obor

10308 Astronomy

Stát vydavatele

Spojené státy

Utajení

není předmětem státního či obchodního tajemství

Odkazy

URL

Kód RIV

RIV/47813059:19630/20:A0000068

Organizační jednotka

Fyzikální ústav v Opavě

DOI

http://dx.doi.org/10.1103/PhysRevD.102.064052

UT WoS

000570979500003

Klíčová slova anglicky

MAGNETIZED ORBITS; FIELD-THEORIES; SPACETIMES; GRAVITY; RESONANCE; CONSTANT; DYNAMICS; ENERGY; CHAOS; SPIN

Štítky

, FÚ2020, RIV21, SGS12-2019

Příznaky

Mezinárodní význam, Recenzováno
Změněno: 19. 4. 2021 13:15, Mgr. Pavlína Jalůvková

Anotace

V originále

In this paper, we explore the test particle motion around black hole in Einstein-Maxwell-scalar (EMS) theory using three different black hole solutions within this theory. We have first analyzed the spacetime curvature structure of these solutions and shown the existence of two singularities and the first one is at the center r = 0. In black hole spacetime, there are two regions divided by the critical value of the cosmological parameter lambda(0). The photon sphere around black hole in EMS theory has also been studied and found that it does not depend on cosmological parameter lambda. We have analyzed the innermost stable circular orbits (ISCO) around black hole and shown that for all solutions ISCO radius for neutral particle decreases with the increase of black hole charge. We have also studied the charged particle motion around the black hole where charged particle motion is considered in the presence of gravitational field and the Coulomb potential. It is shown that ISCO radius for charged particles increases depending on the selected value of the coupling parameter which is in contradiction with observations of the inner edge of the accretion disks of the astrophysical black holes and can be used as powerful tool to rule out the EMS theory from consideration for the gravitational field theory. It also studied the fundamental frequencies governed by test particle orbiting around black hole in EMS theory. Finally, as test of black hole solution in EMS theory ISCO radii is compared with that in Kerr black hole and found that the spin parameter of Kerr can be mimic up to a/M similar or equal to 0.936.
Zobrazeno: 18. 11. 2024 20:31