scholarly journals Analytical computation of quasinormal modes of slowly rotating black holes in dynamical Chern-Simons gravity

2021 ◽  
Vol 104 (6) ◽  
Author(s):  
Manu Srivastava ◽  
Yanbei Chen ◽  
S. Shankaranarayanan
Keyword(s):  
Black Holes ◽  
Quasinormal Modes ◽  
Analytical Computation ◽  
Rotating Black Holes ◽  
Chern Simons

SPECTROSCOPY OF ROTATING BLACK HOLES VIA AN ACTION INVARIANCE

2012 ◽  
Vol 27 (24) ◽  
pp. 1250139 ◽  
Author(s):  
CHENG-ZHOU LIU
Keyword(s):  
Black Holes ◽  
Black Hole ◽  
Quasinormal Modes ◽  
Entropy Spectrum ◽  
Quantization Rule ◽  
Rotating Black Holes

The spectroscopy of rotating black holes are investigated via an action invariance of black holes. Without using the quasinormal modes of black holes, the area and entropy spectrum for Kerr and Kerr–Newman black holes are calculated, respectively. For these rotating black holes, the same result of the equally spaced area and entropy spectrum is derived by utilizing the action invariance and with the help of Bohr–Sommerfield quantization rule. The present black hole spectroscopy is consistent not only to the result of other researches by the action invariance but also the original Bekenstein's spectra.

scholarly journals NON-UNIQUENESS, COUNTERROTATION, AND NEGATIVE HORIZON MASS OF EINSTEIN–MAXWELL–CHERN–SIMONS BLACK HOLES

2006 ◽  
Vol 21 (35) ◽  
pp. 2621-2635 ◽  
Author(s):  
JUTTA KUNZ ◽  
FRANCISCO NAVARRO-LÉRIDA
Keyword(s):  
Black Holes ◽  
Angular Momentum ◽  
Angular Velocity ◽  
Total Mass ◽  
Simons Theory ◽  
Rotational Instability ◽  
Stability And Instability ◽  
Rotating Black Holes ◽  
Chern Simons ◽  
Chern Simons Theory

Stationary black holes in five-dimensional Einstein–Maxwell–Chern–Simons theory possess surprising properties. When considering the Chern–Simons coefficient λ as a parameter, two critical values of λ appear: the supergravity value λ SG = 1, and the value λ = 2. At λ = 1, supersymmetric black holes with vanishing horizon angular velocity, but finite angular momentum exist. As λ increases beyond λ SG a rotational instability arises, and counterrotating black holes appear, whose horizon rotates in the opposite sense to the angular momentum. Thus supersymmetry is associated with the borderline between stability and instability. At λ = 2, rotating black holes with vanishing angular momentum emerge. Beyond λ = 2, black holes may possess a negative horizon mass, while their total mass is positive. Charged rotating black holes with vanishing gyromagnetic ratio appear, and black holes are no longer uniquely characterized by their global charges.

scholarly journals Dirac quasinormal modes of Chern-Simons and BTZ black holes with torsion

2014 ◽  
Vol 89 (2) ◽  
Author(s):  
Ramón Bécar ◽  
P. A. González ◽  
Y. Vásquez
Keyword(s):  
Black Holes ◽  
Quasinormal Modes ◽  
Btz Black Holes ◽  
Chern Simons
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