TURIMOV, Bobur, Javlon RAYIMBAEV, Ahmadjon ABDUJABBAROV, Bobomurat AHMEDOV a Zdeněk STUCHLÍK. Test particle motion around a black hole in Einstein-Maxwell-scalar theory. Physical Review D. US - Spojené státy americké, roč. 102, č. 6, s. "064052-1"-"064052-14", 14 s. ISSN 1550-7998. doi:10.1103/PhysRevD.102.064052. 2020.
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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
Originální jazyk angličtina
Typ výsledku Článek v odborném periodiku
Obor 10308 Astronomy
Stát vydavatele Spojené státy
Utajení není předmětem státního či obchodního tajemství
WWW 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
Změnil Změnila: Mgr. Pavlína Jalůvková, učo 25213. Změněno: 19. 4. 2021 13:15.
Anotace
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.
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