scholarly journals Reexamining the stability of rotating horizonless black shells mimicking Kerr black holes

2021 ◽  
Vol 104 (12) ◽  
Author(s):  
Ulf Danielsson ◽  
Suvendu Giri
Keyword(s):  
Black Holes ◽  
Kerr Black Holes ◽  
The Stability

Superradiant stability of the Kerr black hole

2020 ◽  
Vol 29 (01) ◽  
pp. 2050009 ◽  
Author(s):  
Wen-Xiang Chen ◽  
Zi-Yang Huang
Keyword(s):  
Black Holes ◽  
Black Hole ◽  
Kerr Black Hole ◽  
Algebraic Methods ◽  
Stability Conditions ◽  
Parameter Region ◽  
Kerr Black Holes ◽  
The Stability ◽  
Scalar Perturbations

We know that Kerr black holes are stable for specific conditions. In this paper, we use algebraic methods to prove the stability of the Kerr black hole against certain scalar perturbations. This provides new results for the previously obtained superradiant stability conditions of Kerr black hole. Hod proved that Kerr black holes are stable to massive perturbations in the regime [Formula: see text]. In this paper, we consider some other situations of the stability of the black hole in the complementary parameter region[Formula: see text]

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 Fermat’s principle in black-hole spacetimes

2018 ◽  
Vol 27 (14) ◽  
pp. 1847025 ◽  
Author(s):  
Shahar Hod
Keyword(s):  
Black Holes ◽  
Black Hole ◽  
Black Hole Spacetimes ◽  
Fermat’S Principle ◽  
Kerr Black Holes ◽  
Fermat's Principle ◽  
Asymptotic Observers

Black-hole spacetimes are known to possess closed light rings. We here present a remarkably compact theorem which reveals the physically intriguing fact that these unique null circular geodesics provide the fastest way, as measured by asymptotic observers, to circle around spinning Kerr black holes.

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