Energy-extraction processes from a Kerr black hole immersed in a magnetic field. II. The formalism

1984 ◽  
Vol 30 (8) ◽  
pp. 1625-1631 ◽  
Author(s):  
S. V. Dhurandhar ◽  
N. Dadhich
Keyword(s):  
Magnetic Field ◽  
Black Hole ◽  
Kerr Black Hole ◽  
Energy Extraction ◽  
Extraction Processes

scholarly journals Magnetized Particle Motion in γ-Spacetime in a Magnetic Field

Galaxies ◽  
2020 ◽  
Vol 8 (4) ◽  
pp. 76
Author(s):  
Ahmadjon Abdujabbarov ◽  
Javlon Rayimbaev ◽  
Farruh Atamurotov ◽  
Bobomurat Ahmedov
Keyword(s):  
Magnetic Field ◽  
Black Hole ◽  
Center Of Mass ◽  
Kerr Black Hole ◽  
Compact Object ◽  
Magnetic Interaction ◽  
Mass Energy ◽  
Circular Orbits ◽  
Center Of Mass Energy ◽  
Astrophysical Scenario

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.

Accretion onto a Kerr black hole in the presence of a dipole magnetic field

Pramana ◽  
1985 ◽  
Vol 25 (2) ◽  
pp. 135-148 ◽  
Author(s):  
B R Iyer ◽  
C V Vishveshwara ◽  
P J Wiita ◽  
J J Goldstein
Keyword(s):  
Magnetic Field ◽  
Black Hole ◽  
Kerr Black Hole ◽  
Dipole Magnetic Field

A charged black hole in a uniform magnetic field

1983 ◽  
Vol 61 (8) ◽  
pp. 1192-1197 ◽  
Author(s):  
K. D. Krori ◽  
Sumita Chaudhury ◽  
S. Dowerah
Keyword(s):  
Magnetic Field ◽  
Black Hole ◽  
Event Horizon ◽  
Gaussian Curvature ◽  
Uniform Magnetic Field ◽  
Kerr Black Hole ◽  
Charged Black Hole ◽  
Bonnet Theorem

We present here an investigation of the event horizon of a charged black hole embedded in a uniform magnetic field by studying the Gaussian curvature. It is shown that the Gauss–Bonnet theorem holds for this magnetized black hole and also for a magnetized Kerr black hole.

scholarly journals Extraction of Black Hole Rotational Energy by a Magnetic Field

2003 ◽  
Vol 214 ◽  
pp. 87-90
Author(s):  
Shinji Koide
Keyword(s):  
Magnetic Field ◽  
Black Hole ◽  
Large Scale ◽  
Kerr Black Hole ◽  
Negative Energy ◽  
Rotational Energy ◽  
Alfven Wave ◽  
Numerical Result ◽  
General Relativistic ◽  
Magnetohydrodynamic Simulations

We have developed a numerical method for general relativistic magnetohydrodynamic simulations in Kerr space-time. The method is applied to the basic astrophysical problem of the Kerr black hole activity in the large-scale strong magnetic field. The numerical result shows that the magnetic field extracts the rotational energy of the black hole with negative energy-at-infinity and the torsional Alfven wave is induced from the ergosphere.

scholarly journals Energy extraction from a Konoplya–Zhidenko rotating non-Kerr black hole

2018 ◽  
Vol 926 ◽  
pp. 83-94 ◽  
Author(s):  
Fen Long ◽  
Songbai Chen ◽  
Shangyun Wang ◽  
Jiliang Jing
Keyword(s):  
Black Hole ◽  
Kerr Black Hole ◽  
Energy Extraction
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