Motion and high energy collision of magnetized particles around a Hořava-Lifshitz black hole

Toshmatov, Bobir; Abdujabbarov, Ahmadjon; Ahmedov, Bobomurat; Stuchlík, Zdeněk

doi:10.1007/s10509-015-2533-y

Cited by 48 publications

(31 citation statements)

References 38 publications

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“…Note that the geodesic structure of the regular black holes outside the horizon is similar to those of the Schwarzschild or Reissner-Nordström (RN) black hole spacetimes, but under the inner horizon, no circular geodesics can exist. The geodesic structure of the no-horizon spacetimes is similar to those of the naked singularity spacetimes of the RN type, or the Kehagias-Sfetsos type [43][44][45][46][47] representing a widely discussed asymptotically flat solution of modified Hořava quantum gravity [2][3][4].…”

Section: Introductionmentioning

confidence: 81%

Generic rotating regular black holes in general relativity coupled to nonlinear electrodynamics

2017

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We construct regular rotating black hole and no-horizon spacetimes based on the recently introduced spherically symmetric generic regular black hole spacetimes related to electric or magnetic charge under nonlinear electrodynamics coupled to general relativity that for special values of the spacetime parameters reduce to the Bardeen and Hayward spacetimes. We show that the weak and strong energy conditions are violated inside the Cauchy horizons of these generic rotating black holes. We give the boundary between the rotating black hole and no-horizon spacetimes and determine the black hole horizons and the boundary of the ergosphere. We introduce the separated Carter equations for the geodesic motion in these rotating spacetimes. For the most interesting new class of the regular spacetimes, corresponding for magnetic charges to the Maxwell field in the weak field limit of the nonlinear electrodynamics, we determine the structure of the circular geodesics and discuss their properties. We study the epicyclic motion of a neutral particle moving along the stable circular orbits around the "Maxwellian" rotating regular black holes. We show that epicyclic frequencies measured by the distant observers and related to the oscillatory motion of the neutral test particle along the stable circular orbits around the rotating singular and regular Maxwellian black holes are always smaller than ones in the Kerr spacetime.

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Section: Introductionmentioning

confidence: 81%

Generic rotating regular black holes in general relativity coupled to nonlinear electrodynamics

2017

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“…The black hole immersed in magnetic field has been studied in the pioneering work of Wald [21]. After that, numerous studies have been devoted to the electromagnetic field around various black holes and particle motion in external magnetic field (see e.g.,) [22][23][24][25][26][27][28][29][30][31][32][33][34][35][36][37][38][39][40][41].…”

Section: Introductionmentioning

confidence: 99%

“…Magnetized particle motion around non-Schwarzschild black holes immersed in an external uniform magnetic field has been recently studied in [44]. Acceleration of magnetized particles around rotating black holes in quintessence and high energy collision of magnetized particles around a Hořava-Lifshitz black hole have been studied in [29,30]. Magnetized particles acceleration around a Schwarzschild black hole in a magnetic field has been analyzed in [32].…”

Section: Introductionmentioning

confidence: 99%

Magnetized Particle Motion around Black Holes in Conformal Gravity: Can Magnetic Interaction Mimic Spin of Black Holes?

et al. 2020

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Magnetized particle motion around black holes in conformal gravity immersed in asymptotically uniform magnetic field has been studied. We have also analyzed the behavior of magnetic fields near the horizon of the black hole in conformal gravity and shown that with the increase of conformal parameters L and N the value of angular component of magnetic field at the stellar surface decreases. The maximum value of the effective potential corresponding to circular motion of the magnetized particle increases with the increase of conformal parameters. It is shown that in all cases of neutral, charged and magnetized particle collisions in the black hole environment the center-of-mass energy decreases with the increase of conformal parameters L and N. In the case of the magnetized and negatively charged particle collisions, the innermost collision point with the maximum center-of-mass energy comes closer to the central object due to the effects of the parameters of the conformal gravity. We have applied the results to the real astrophysical scenario when a pulsar treated as a magnetized particle is orbiting the super massive black hole (SMBH) Sgr A* in the center of our galaxy in order to obtain the estimation of magnetized compact object’s orbital parameter. The possible detection of pulsar in Sgr A* close environment can provide constraints on black hole parameters. Here we have shown that there is degeneracy between spin of SMBH and ambient magnetic field and consequently the interaction of magnetic field ∼ 10 2 Gauss with magnetic moment of magnetized neutron star can in principle mimic spin of Kerr black holes up to 0.6 .

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“…The electromagnetic field configuration in the vicinity of a black hole immersed in an external magnetic field was first considered by Wald [10]. After that seminal work, many other authors have studied the properties of the spacetime around a black hole immersed in an external magnetic field [11][12][13][14][15][16][17][18][19][20][21][22][23][24][25]. The magnetic field of a current loop around a black hole was considered in [26].…”

Section: Introductionmentioning

confidence: 99%

Gravitational lensing by a magnetized compact object in the presence of plasma

Turimov

Ahmedov

Abdujabbarov

et al. 2019

Int. J. Mod. Phys. D

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We study the gravitational lensing in the weak field approximation assuming the presence of a plasma and of a magnetic field around a compact gravitational source. The external magnetic field causes the split of the image, as the counterpart of the Zeeman effect. The magnetic field affects the magnification of images, creating additional components. We also study the time delay of an electromagnetic signal due to the geometry and the gravitational field around the source. We show that the time delay strongly depends on the plasma parameters. Lastly, we consider the effects of the presence of an inhomogeneous plasma on the gravitational lensing.

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Motion and high energy collision of magnetized particles around a Hořava-Lifshitz black hole

Cited by 48 publications

References 38 publications

Generic rotating regular black holes in general relativity coupled to nonlinear electrodynamics

Generic rotating regular black holes in general relativity coupled to nonlinear electrodynamics

Magnetized Particle Motion around Black Holes in Conformal Gravity: Can Magnetic Interaction Mimic Spin of Black Holes?

Gravitational lensing by a magnetized compact object in the presence of plasma

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