Optical properties of magnetized black hole in plasma

Ahmedov, Bobomurat; Turimov, Bobur; Stuchlík, Zdeněk; Tursunov, Arman

doi:10.1142/s2010194519600188

Cited by 22 publications

(10 citation statements)

References 51 publications

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“…The effect of the magnetic field in optical properties of black hole has been discussed in Refs. [27,28].…”

Section: Introductionmentioning

confidence: 99%

Magnetized Black Hole as an Accelerator of Charged Particle

Turimov

2021

The 1st Electronic Conference on Universe

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Astrophysical accretion processes near the black hole candidates, such as active galactic nuclei (AGN), X-ray binary (XRB), and other astrophysical sources, are associated with high-energetic emission of radiation of relativistic particles and outflows (winds and/or jets). It is widely believed that the magnetic field plays a very important role to explain such high energetic processes in the vicinity of those astrophysical sources. In the present research note, we propose that the black hole is embedded in an asymptotically uniform magnetic field. We investigate the dynamical motion of charged particles in the vicinity of a weakly magnetized black hole. We show that in the presence of the magnetic field, the radius of the innermost stable circular orbits (ISCO) for a charged particle is located close to the black hole's horizon. The fundamental frequencies, such as Keplerian and epicyclic frequencies of the charged particle are split into two parts due to the magnetic field, as an analog of the Zeeman effect. The orbital velocity of the charged particle measured by a local observer has been computed in the presence of the external magnetic field. We also present an analytical expression for the four-acceleration of the charged particle orbiting around black holes. Finally, we determine the intensity of the radiating charged accelerating relativistic particle orbiting around the magnetized black hole.

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“…The effect of the magnetic field in optical properties of black hole has been discussed in Refs. [27,28].…”

Section: Introductionmentioning

confidence: 99%

Magnetized Black Hole as an Accelerator of Charged Particle

Turimov

2021

The 1st Electronic Conference on Universe

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“…The effect of the external magnetic field has been discussed in Refs. [68,69]. Analysis of particle motion plays as a powerful tool in revealing geometric properties of compact objects and astrophysical processes in the environment surrounding the black holes, i.e.…”

Section: Introductionmentioning

confidence: 99%

Motion of charged and spinning particle influenced by dark matter field surrounding a charged dyonic black hole

Shaymatov,

Sheoran,

Siwach

2021

Preprint

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We investigate the motion of massive charged and spinning test particles around a charged dyonic black hole spacetime surrounded by perfect fluid scalar dark matter field. We obtain the equations of motion and find the expressions for the four-velocity for the case of a charged particle, and fourmomentum components for the case of a spinning particle. The trajectories for various values of electric Qe and magnetic Qm charges are investigated under the influence of dark matter field λ. We find the equations of motion of a spinning particle that follows a non-geodesic trajectory via Lagrangian approach in addition to the charged and non-spinning particles that follow geodesic motion in this set-up. We study in detail the properties of innermost stable circular orbits (ISCOs) in the equatorial plane. The study of ISCOs of a spinning massive particle is done by using the pole-dipole approximation. We show that, in addition to the particle's spin, the dark matter field parameter λ and black hole charges (Qm and Qe) have a significant influence on the ISCOs of spinning particles. It is observed that if the spin is parallel to the total angular momentum J (i.e. S > 0), the ISCO parameters (i.e.rISCO, LISCO and EISCO) of a spinning particle are smaller than those of a non-spinning particle, whereas if the spin is anti-parallel to total angular momentum J (i.e. S < 0), the value of the ISCO parameters is greater than that of the non-spinning particle. We also show that for the corresponding values of spin parameter S, the behaviour of Keplerian angular frequency of ISCO ΩISCO is opposite to that of rISCO, LISCO and EISCO. As an astrophysical application, the study of innermost stable circular orbits (ISCOs) may play a significant role as ISCOs can be used to set the inner edge of the accretion disk around black hole as well as the initial condition of the binary black hole mergers.

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“…The energetic processes around BHs in the presence of an external magnetic field have been explored in [22][23][24][25][65][66][67][68]. Other astrophysical properties of gravitational compact objects in the presence of a magnetic field have been studied in references [69][70][71].…”

Section: Introductionmentioning

confidence: 99%

Magnetized Particle Motion in γ-Spacetime in a Magnetic Field

et al. 2020

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In the present work we explored the dynamics of magnetized particles around the compact object in γ-spacetime in the presence of an external asymptotically-uniform magnetic field. The analysis of the circular orbits of magnetized particles around the compact object in the spacetime of a γ-object immersed in the external magnetic field has shown that the area of stable circular orbits of magnetized particles increases with the increase of γ-parameter. We have also investigated the acceleration of the magnetized particles near the γ-object and shown that the center-of-mass energy of colliding magnetized particles increases with the increase of γ-parameter. Finally, we have applied the obtained results to the astrophysical scenario and shown that the values of γ-parameter in the range of γ∈(0.5,1) can mimic the spin of Kerr black hole up to a≃0.85, while the magnetic interaction can mimic the γ-parameter at γ∈(0.8,1) and spin of a Kerr black hole up to a≃0.3.

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Optical properties of magnetized black hole in plasma

Cited by 22 publications

References 51 publications

Magnetized Black Hole as an Accelerator of Charged Particle

Magnetized Black Hole as an Accelerator of Charged Particle

Motion of charged and spinning particle influenced by dark matter field surrounding a charged dyonic black hole

Magnetized Particle Motion in γ-Spacetime in a Magnetic Field

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