scholarly journals Extraction of energy from an extremal rotating electrovacuum black hole: Particle collisions in the equatorial plane

2022 ◽  
Vol 105 (2) ◽  
Author(s):  
Filip Hejda ◽  
José P. S. Lemos ◽  
Oleg B. Zaslavskii
Keyword(s):  
Black Hole ◽  
Equatorial Plane ◽  
Particle Collisions

On embeddings of the Kerr geometry

1981 ◽  
Vol 59 (5) ◽  
pp. 688-692 ◽  
Author(s):  
Nigel A. Sharp
Keyword(s):  
Black Hole ◽  
Event Horizon ◽  
Equatorial Plane ◽  
Kerr Metric ◽  
Intrinsic Structure ◽  
Kerr Geometry ◽  
Rotating Black Hole ◽  
Isometric Embeddings

The use of isometric embeddings of curved geometries reveals their intrinsic structure in a way that is readily appreciated. This is done for 3 two-surfaces sliced from the Kerr metric which describes a rotating black hole: the equatorial plane, the event horizon, and the ergosurface.

scholarly journals Gyroscope precession along unbound equatorial plane orbits around a Kerr black hole

2016 ◽  
Vol 94 (12) ◽  
Author(s):  
Donato Bini ◽  
Andrea Geralico ◽  
Robert T. Jantzen
Keyword(s):  
Black Hole ◽  
Equatorial Plane ◽  
Kerr Black Hole ◽  
Gyroscope Precession

scholarly journals Particle collisions on stringy black hole background

2010 ◽  
Vol 2010 (12) ◽  
Author(s):  
Shao-Wen Wei ◽  
Yu-Xiao Liu ◽  
Hai-Tao Li ◽  
Feng-Wei Chen
Keyword(s):  
Black Hole ◽  
Particle Collisions ◽  
Black Hole Background

scholarly journals Particle collisions near the cosmological horizon of a Reissner-Nordström-de Sitter black hole

JETP Letters ◽  
2011 ◽  
Vol 94 (8) ◽  
pp. 589-592 ◽  
Author(s):  
C. Zhong ◽  
S. Gao
Keyword(s):  
Black Hole ◽  
Cosmological Horizon ◽  
De Sitter ◽  
Particle Collisions

scholarly journals Classical and quantum cross-section for black hole production in particle collisions

2002 ◽  
Vol 533 (1-2) ◽  
pp. 153-161 ◽  
Author(s):  
Sergey N. Solodukhin
Keyword(s):  
Black Hole ◽  
Cross Section ◽  
Particle Collisions

scholarly journals Tidal disruption event discs around supermassive black holes: disc warp and inclination evolution

2019 ◽  
Vol 487 (4) ◽  
pp. 4965-4984 ◽  
Author(s):  
J J Zanazzi ◽  
Dong Lai
Keyword(s):  
Black Hole ◽  
Equatorial Plane ◽  
Accretion Rate ◽  
Accretion Disc ◽  
Precession Frequency ◽  
Tidal Disruption ◽  
Eigenmode Analysis ◽  
Accretion Rates ◽  
Rigid Disc ◽  
Disruption Event

ABSTRACT After the tidal disruption event (TDE) of a star around a supermassive black hole (SMBH), the bound stellar debris rapidly forms an accretion disc. If the accretion disc is not aligned with the spinning SMBH’s equatorial plane, the disc will be driven into Lense–Thirring precession around the SMBH’s spin axis, possibly affecting the TDE’s light curve. We carry out an eigenmode analysis of such a disc to understand how the disc’s warp structure, precession, and inclination evolution are influenced by the disc’s and SMBH’s properties. We find an oscillatory warp may develop as a result of strong non-Keplarian motion near the SMBH. The global disc precession frequency matches the Lense–Thirring precession frequency of a rigid disc around a spinning black hole within a factor of a few when the disc’s accretion rate is high, but deviates significantly at low accretion rates. Viscosity aligns the disc with the SMBH’s equatorial plane over time-scales of days to years, depending on the disc’s accretion rate, viscosity, and SMBH’s mass. We also examine the effect of fallback material on the warp evolution of TDE discs, and find that the fallback torque aligns the TDE disc with the SMBH’s equatorial plane in a few to tens of days for the parameter space investigated. Our results place constraints on models of TDE emission which rely on the changing disc orientation with respect to the line of sight to explain observations.

scholarly journals CLASSICAL BLACK HOLE PRODUCTION IN QUANTUM PARTICLE COLLISIONS

2005 ◽  
Vol 20 (11) ◽  
pp. 2398-2402 ◽  
Author(s):  
VYACHESLAV S. RYCHKOV
Keyword(s):  
Black Hole ◽  
Quantum Particle ◽  
Particle Collisions ◽  
In Trans

A semiclassical picture of black hole production in trans-Planckian collisions is reviewed.

scholarly journals Extraction of energy from an extremal rotating electrovacuum black hole: Particle collisions along the axis of symmetry

2019 ◽  
Vol 100 (6) ◽  
Author(s):  
F. Hejda ◽  
J. Bičák ◽  
O. B. Zaslavskii
Keyword(s):  
Black Hole ◽  
Particle Collisions ◽  
Axis Of Symmetry

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

Universe ◽  
2020 ◽  
Vol 6 (3) ◽  
pp. 44 ◽  
Author(s):  
Kamoliddin Haydarov ◽  
Ahmadjon Abdujabbarov ◽  
Javlon Rayimbaev ◽  
Bobomurat Ahmedov
Keyword(s):  
Magnetic Field ◽  
Black Holes ◽  
Black Hole ◽  
Particle Motion ◽  
Center Of Mass ◽  
Conformal Gravity ◽  
Mass Energy ◽  
Particle Collisions ◽  
Center Of Mass Energy ◽  
Sgr A

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 .

SOLITONS EXPERIENCE FOR BLACK HOLE PRODUCTION IN ULTRARELATIVISTIC PARTICLE COLLISIONS

2012 ◽  
Vol 26 (27n28) ◽  
pp. 1243010 ◽  
Author(s):  
I. YA. AREF'EVA
Keyword(s):  
Black Hole ◽  
Scattering Amplitudes ◽  
Planck Scale ◽  
Functional Integral ◽  
Quantum Field ◽  
Mass Energy ◽  
Particle Collisions ◽  
Functional Integral Method ◽  
Geometrical Cross Section ◽  
Current Paradigm

We discuss the analogy between soliton scattering in quantum field theory and black hole/wormholes (BH/WH) production in ultrarelativistic particle collisions in gravity. It is a common wisdom of the current paradigm suggests that BH/WH formation in particles collisions will happen when a center-mass energy of colliding particles is sufficiently above the Planck scale (the transplanckian region) and the BH/WH production can be estimated by the classical geometrical cross section. We compare the background of this paradigm with the functional integral method to scattering amplitudes and, in particular, we stress the analogy of the BH production in collision of ultrarelativistic particle and appearance of breathers poles in the scattering amplitudes in the Sin–Gordon model.

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