Electromagnetic fields of slowly rotating magnetized compact stars in conformal gravity

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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“…Now using Equations (16) and (17) one can easily calculate the interaction term D * F in the following form…”

Section: Magnetized Particle Motion Around Black Holes In Conformal Gmentioning

confidence: 99%

“…The electromagnetic fields of slowly rotating neutron stars in conformal gravity have been studied in [17]. The authors of Ref.…”

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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“…where the Larmor frequency for electron can be written explicitly in the form 56 ω L (r, θ) = e m e 1 2…”

Section: Weak Gravitational Lensing In Magnetized Plasmamentioning

confidence: 99%

Optical properties of magnetized black hole in plasma

Ahmedov

Turimov

Stuchlík

et al. 2019

Int. J. Mod. Phys. Conf. Ser.

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We study in the weak field limit the gravitational lensing by spherically symmetric compact object immersed in an asymptotically uniform magnetic field in the presence of plasma and our approach is based on the medium modified Hamiltonian one. We show that the magnetized plasma in the environment of compact object may lead to split of the Einstein cross, creating additional lensed components. Finally we calculate magnification and time delay related to the individual images.

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“…The Kerr black hole (BH) geometry changes the structure of the asymptotically-uniform magnetic field in its close vicinity [1]. The pioneering work of Wald [1] has initiated the study of properties of the electromagnetic field around axial-symmetric BHs and magnetized neutron stars (see, e.g., [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19]).…”

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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Electromagnetic fields of slowly rotating magnetized compact stars in conformal gravity

Cited by 34 publications

References 79 publications

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

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

Optical properties of magnetized black hole in plasma

Magnetized Particle Motion in γ-Spacetime in a Magnetic Field

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