Rotating black hole in a strong magnetic field

1980 ◽  
Vol 23 (3) ◽  
pp. 179-183 ◽  
Author(s):  
A. N. Aliev ◽  
D. V. Gal'tsov ◽  
A. A. Sokolov
Keyword(s):  
Magnetic Field ◽  
Black Hole ◽  
Strong Magnetic Field ◽  
Rotating Black Hole

scholarly journals A strong magnetic field around the supermassive black hole at the centre of the Galaxy

Nature ◽  
2013 ◽  
Vol 501 (7467) ◽  
pp. 391-394 ◽  
Author(s):  
R. P. Eatough ◽  
H. Falcke ◽  
R. Karuppusamy ◽  
K. J. Lee ◽  
D. J. Champion ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Black Hole ◽  
Strong Magnetic Field ◽  
Supermassive Black Hole ◽  
The Galaxy

Why only a small fraction of quasars are radio loud?

2018 ◽  
Vol 14 (S342) ◽  
pp. 201-204
Author(s):  
Xinwu Cao
Keyword(s):  
Magnetic Field ◽  
Black Hole ◽  
Angular Momentum ◽  
Angular Velocity ◽  
Strong Magnetic Field ◽  
Weak Magnetic Field ◽  
Thin Disk ◽  
Relativistic Jets ◽  
Jet Formation ◽  
The Magnetic Field

AbstractIt is still a mystery why only a small fraction of quasars contain relativistic jets. A strong magnetic field is a necessary ingredient for jet formation. Gas falls from the Bondi radius RB nearly freely to the circularization radius Rc, and a thin accretion disk is formed within Rc We suggest that the external weak magnetic field threading interstellar medium is substantially enhanced in this region, and the magnetic field at Rc can be sufficiently strong to drive outflows from the disk if the angular velocity of the gas is low at RB. In this case, the magnetic field is efficiently dragged in the disk, because most angular momentum of the disk is removed by the outflows that lead to a significantly high radial velocity. The strong magnetic field formed in this way may accelerate jets in the region near the black hole, either by the Blandford-Payne or/and Blandford-Znajek mechanisms. If the angular velocity of the circumnuclear gas is low, the field advection in the thin disk is inefficient, and it will appear as a radio-quiet (RQ) quasar.

Three-dimensional slowly rotating black hole in Einstein-power-Maxwell theory

2020 ◽  
pp. 2050111
Author(s):  
M. B. Tataryn ◽  
M. M. Stetsko
Keyword(s):  
Magnetic Field ◽  
Black Hole ◽  
Black Hole Solution ◽  
Three Dimensional ◽  
Integral Solution ◽  
Static Case ◽  
Maxwell Theory ◽  
Rotating Black Hole ◽  
Metric Function ◽  
Small Rotation

A three-dimensional slowly rotating black hole solution in the presence of negative cosmological constant in the Einstein-power-Maxwell theory is studied. It is shown that in the small rotation limit, the electric field, diagonal metric function and thermodynamic properties are the same as for static case, whereas the small rotation gives in addition a nondiagonal metric function and magnetic field which are also small. For these functions cased by rotation of black hole, exact integral solution and analytic asymptotic solution were obtained.

scholarly journals OBLIQUE MAGNETIC FIELDS AND THE ROLE OF FRAME DRAGGING NEAR ROTATING BLACK HOLE

2014 ◽  
Vol 54 (6) ◽  
pp. 398-413 ◽  
Author(s):  
Vladimír Karas ◽  
Ondřej Kopáček ◽  
Devaky Kunneriath
Keyword(s):  
Magnetic Field ◽  
Black Hole ◽  
Large Scale ◽  
Frame Dragging ◽  
Rotating Black Hole ◽  
Large Scale Magnetic Field ◽  
Set Up ◽  
Magnetic Null ◽  
Future Work

<p>Magnetic null points can <span style="font-size: 10px;">develop near the ergosphere boundary of a rotating black hole by the combined effects of strong gravitational field and the frame-dragging mechanism. The induced electric component does not vanish in the magnetic null and an efficient process of particle acceleration can occur in its immediate vicinity. Furthermore, the effect of imposed (weak) magnetic field can trigger an onset of chaos in the motion of electrically charged particles. The model set-up appears to be relevant for low-accretion-rate nuclei of some galaxies which exhibit episodic accretion events (such as the Milky Way's supermassive black hole) embedded in a large-scale magnetic field of external origin with respect to the central black hole. In this contribution we summarise recent results and we give an outlook for future work with the focus on the role of gravito-magnetic effects caused by rotation of the black hole.</span></p>

scholarly journals Screw Instability of the Magnetic Field Connecting a Rotating Black Hole with Its Surrounding Disk

2004 ◽  
Vol 601 (2) ◽  
pp. 1031-1037 ◽  
Author(s):  
Ding‐Xiong Wang ◽  
Ren‐Yi Ma ◽  
Wei‐Hua Lei ◽  
Guo‐Zheng Yao
Keyword(s):  
Magnetic Field ◽  
Black Hole ◽  
Rotating Black Hole ◽  
The Magnetic Field

scholarly journals Ultrahigh energy particle collisions near the black hole horizon in the strong magnetic field

2014 ◽  
Vol 29 (21) ◽  
pp. 1450112 ◽  
Author(s):  
O. B. Zaslavskii
Keyword(s):  
Magnetic Field ◽  
Black Hole ◽  
Strong Magnetic Field ◽  
Center Of Mass ◽  
Black Hole Horizon ◽  
Ultrahigh Energy ◽  
Particle Collisions ◽  
Energy Particle ◽  
Neutral Particles ◽  
Mass Frame

We consider collision between two charged (or charged and neutral) particles near the black hole horizon in the strong magnetic field B. It is shown that there exists a strip near the horizon within which collision of any two such particles leads to ultrahigh energy in the center-of-mass frame (CM frame). The results apply to generic (not necessarily vacuum) black holes.

Surface geometry of a rotating black hole in a magnetic field

1986 ◽  
Vol 33 (10) ◽  
pp. 2780-2787 ◽  
Author(s):  
Ravi Kulkarni ◽  
Naresh Dadhich
Keyword(s):  
Magnetic Field ◽  
Black Hole ◽  
Surface Geometry ◽  
Rotating Black Hole
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