The spectrum of electromagnetic jets from Kerr black holes and naked singularities in the Teukolsky perturbation theory

2010 ◽  
Vol 332 (2) ◽  
pp. 385-401 ◽  
Author(s):  
Denitsa Staicova ◽  
Plamen Fiziev
Keyword(s):  
Black Holes ◽  
Perturbation Theory ◽  
Naked Singularities ◽  
Kerr Black Holes

Black-hole perturbation theory

2018 ◽  
Author(s):  
Michele Maggiore
Keyword(s):  
Black Holes ◽  
Black Hole ◽  
Perturbation Theory ◽  
Normal Modes ◽  
Teukolsky Equation ◽  
Kerr Black Holes

Perturbation theory over Schwarzschild black holes. Regge-Wheeler and Zerilli equations. Black hole quasi-normal modes. Perturbations of Kerr black-holes. Null tetrads and Newman-Penrose formalism. Perturbations of Kerr black holes and Teukolsky equation.

scholarly journals Gravitomagnetism and pulsar beam precession near a Kerr black hole

2019 ◽  
Vol 490 (3) ◽  
pp. 3262-3286 ◽  
Author(s):  
Prashant Kocherlakota ◽  
Pankaj S Joshi ◽  
Sudip Bhattacharyya ◽  
Chandrachur Chakraborty ◽  
Alak Ray ◽  
...  
Keyword(s):  
Black Holes ◽  
Black Hole ◽  
Kerr Black Hole ◽  
Theoretical Work ◽  
Pulse Frequency ◽  
Spin Precession ◽  
Naked Singularities ◽  
Frame Dragging ◽  
Kerr Black Holes ◽  
Short Time

ABSTRACT A rotating black hole causes the spin axis of a nearby pulsar to precess due to geodetic and gravitomagnetic frame-dragging effects. The aim of our theoretical work here is to explore how this spin precession can modify the rate at which pulses are received on Earth. Towards this end, we obtain the complete evolution of the beam vectors of pulsars moving on equatorial circular orbits in the Kerr space–time, relative to asymptotic fixed observers. We proceed to establish that such spin precession effects can significantly modify observed pulse frequencies and, in specific, we find that the observed pulse frequency rises sharply as the orbit shrinks, potentially providing a new way to locate horizons of Kerr black holes, even if observed for a very short time period. We also discuss implications for detections of sub-millisecond pulsars, pulsar nulling, quasi-periodic oscillations, multiply peaked pulsar Fourier profiles, and how Kerr black holes can potentially be distinguished from naked singularities.

scholarly journals Penrose Process: Its Variants and Astrophysical Applications

Universe ◽  
2021 ◽  
Vol 7 (11) ◽  
pp. 416
Author(s):  
Zdeněk Stuchlík ◽  
Martin Kološ ◽  
Arman Tursunov
Keyword(s):  
Black Holes ◽  
Charged Particles ◽  
High Energy ◽  
Negative Energy ◽  
Ultra High Energy ◽  
Naked Singularities ◽  
High Energies ◽  
Penrose Process ◽  
Kerr Black Holes ◽  
Electrically Charged

We present a review of the Penrose process and its modifications in relation to the Kerr black holes and naked singularities (superspinars). We introduce the standard variant of this process, its magnetic version connected with magnetized Kerr black holes or naked singularities, the electric variant related to electrically charged Schwarzschild black holes, and the radiative Penrose process connected with charged particles radiating in the ergosphere of magnetized Kerr black holes or naked singularities. We discuss the astrophysical implications of the variants of the Penrose process, concentrating attention to the extreme regime of the magnetic Penrose process leading to extremely large acceleration of charged particles up to ultra-high energy E∼1022 eV around magnetized supermassive black holes with mass M∼1010M⊙ and magnetic intensity B∼104 G. Similarly high energies can be obtained by the electric Penrose process. The extraordinary case is represented by the radiative Penrose process that can occur only around magnetized Kerr spacetimes but just inside their ergosphere, in contrast to the magnetic Penrose process that can occur in a more extended effective ergosphere determined by the intensity of the electromagnetic interaction. The explanation is simple, as the radiative Penrose process is closely related to radiated photons with negative energy whose existence is limited just to the ergosphere.

scholarly journals Growth of accretion driven scalar hair around Kerr black holes

2021 ◽  
Vol 103 (4) ◽  
Author(s):  
Jamie Bamber ◽  
Katy Clough ◽  
Pedro G. Ferreira ◽  
Lam Hui ◽  
Macarena Lagos
Keyword(s):  
Black Holes ◽  
Scalar Hair ◽  
Kerr Black Holes

scholarly journals Second-order perturbations of Kerr black holes: Formalism and reconstruction of the first-order metric

2021 ◽  
Vol 103 (10) ◽  
Author(s):  
Nicholas Loutrel ◽  
Justin L. Ripley ◽  
Elena Giorgi ◽  
Frans Pretorius
Keyword(s):  
Black Holes ◽  
Second Order ◽  
First Order ◽  
Kerr Black Holes

scholarly journals Aschenbach effect: Unexpected topology changes in the motion of particles and fluids orbiting rapidly rotating Kerr black holes

2005 ◽  
Vol 71 (2) ◽  
Author(s):  
Zdeněk Stuchlík ◽  
Petr Slaný ◽  
Gabriel Török ◽  
Marek A. Abramowicz
Keyword(s):  
Black Holes ◽  
Topology Changes ◽  
Kerr Black Holes

scholarly journals Initial data for perturbed Kerr black holes on hyperboloidal slices

2014 ◽  
Vol 31 (16) ◽  
pp. 165001 ◽  
Author(s):  
David Schinkel ◽  
Rodrigo Panosso Macedo ◽  
Marcus Ansorg
Keyword(s):  
Black Holes ◽  
Initial Data ◽  
Kerr Black Holes

scholarly journals Kerr black holes as accelerators of spinning test particles

2016 ◽  
Vol 93 (8) ◽  
Author(s):  
Minyong Guo ◽  
Sijie Gao
Keyword(s):  
Black Holes ◽  
Test Particles ◽  
Kerr Black Holes

scholarly journals A MONTE CARLO CODE FOR RELATIVISTIC RADIATION TRANSPORT AROUND KERR BLACK HOLES

2013 ◽  
Vol 777 (1) ◽  
pp. 11 ◽  
Author(s):  
Jeremy D. Schnittman ◽  
Julian H. Krolik
Keyword(s):  
Black Holes ◽  
Monte Carlo ◽  
Radiation Transport ◽  
Monte Carlo Code ◽  
Kerr Black Holes
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