Orbital dynamics of the gravitational field of stringy black holes

Geng, Jin-Ling; Li, En-Kun

doi:10.1142/s0217732314501442

Cited by 3 publications

(3 citation statements)

References 40 publications

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“…Previously, this analysis has been successively applied on Schwarzschild [39] to describe its relativistic orbits. The relativistic orbits of stingy black holes [40] and regular Hayward black holes [41] have also been discussed by following the same phase-plane analysis. Inspired with the previous works on this topic so far, we are going to construct the relativistic orbits of the test particle in the gravitational field of Reissner-Nordström (RN) type regular black hole.…”

Section: Introductionmentioning

confidence: 99%

Phase-plane analysis of test particle orbits in regular black holes

Amir¹

2020

Commun. Theor. Phys.

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We investigate phase-plane analysis of general relativistic orbits in a gravitational field of the Reissner–Nordström-type regular black hole spacetime. We employ phase-plane analysis to obtain different phase-plane diagrams of the test particle orbits by varying charge q and dimensionless parameter β, where β contains angular momentum of the test particle. We compute numerical values of radii for the innermost stable orbits and corresponding values of energy required to place the test particle in orbits. Later on, we employ similar analysis on an Ayón–Beato–García (ABG) regular black hole and a comparison regarding key results is also included.

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Section: Introductionmentioning

confidence: 99%

Phase-plane analysis of test particle orbits in regular black holes

Amir¹

2020

Commun. Theor. Phys.

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“…In order to explain the structure of geodesics better, the researchers have done a lot of work. Different research methods have been presented, including the effective potential analysis method [38][39][40] and the phase plane method [41][42][43][44]. By analyzing the behavior of effective potential, Juhua Chen et al [38] investigated the geodesics of particles in Horava-Lifshitz space-time [45], and Sheng Zhou et al [39] studied the time-like geodesic structure of the spherically symmetric black hole space-time [46].…”

Section: Introductionmentioning

confidence: 99%

Structure of geodesics in the regular Hayward black hole space-time

Shi

Duan

2018

Gen Relativ Gravit

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The regular Hayward model describes a non-singular black hole space-time. By analyzing the behaviors of effective potential and solving the equation of orbital motion, we investigate the time-like and null geodesics in the regular Hayward black hole space-time. Through detailed analyses of corresponding effective potentials for massive particles and photons, all possible orbits are numerically simulated. The results show that there may exist four orbital types in the time-like geodesics structure: planetary orbits, circular orbits, escape orbits and absorbing orbits. In addition, when ℓ, a convenient encoding of the central energy density 3/8πℓ 2 , is 0.6M , and b is 3.9512M as a specific value of angular momentum, escape orbits exist only under b > 3.9512M . The precession direction is also associated with values of b. With b = 3.70M the bound orbits shift clockwise but counter-clockwise with b = 5.00M in the regular Hayward black hole space-time. We also find that the structure of null geodesics is simpler than that of time-like geodesics.There only exist three kinds of orbits (unstable circle orbits, escape orbits and absorbing orbits).

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“…Furthermore, it is found that some solutions of the stringy theory can be considered as black hole (Cvetič and Youm 1996a,b), and this theory can combine the general relativity with the quantum field theory consistently. Therefore, the study of the stringy theory has been a hot point recently (Zhang et al 2014;Geng et al 2015;Li and Zhao 2015;Kuniyal et al 2015). Now, in the present paper, we would like to examine the accretion of dark energy onto the stringy electrically charged black hole.…”

Section: Introductionmentioning

confidence: 99%

Accretion of dark energy onto stringy electrically charged black hole

Geng

Duan

2015

Astrophys Space Sci

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This paper studies the accretion of dark energy onto a stringy electrically charged black hole. Solution for a general spherical accretion of the ideal fluid onto a black hole is given first. It is shown that the location of the critical point lies inside the event horizon. In our paper, two solvable models of dark energy are considered. For the linearized model, the expression for the mass of the black hole is derived. And for the Chaplygin gas model, the change rate of the black hole mass is obtained. The results show that the mass of the stringy electrically charged black hole is fixed when ρ + p = 0, but decreases at ρ + p < 0 and increases at ρ +p > 0. Then, we conclude that the accretion of phantomlike dark energy makes the mass of the black hole decrease, and the accretion of the quintessence-like dark energy can increase the black hole mass. The bigger the absolute value of the pressure is, the faster the black hole mass decreases.

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Orbital dynamics of the gravitational field of stringy black holes

Cited by 3 publications

References 40 publications

Phase-plane analysis of test particle orbits in regular black holes

Phase-plane analysis of test particle orbits in regular black holes

Structure of geodesics in the regular Hayward black hole space-time

Accretion of dark energy onto stringy electrically charged black hole

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