scholarly journals Separable electromagnetic perturbations of rotating black holes

2021 ◽  
Vol 103 (10) ◽  
Author(s):  
Barry Wardell ◽  
Chris Kavanagh
Keyword(s):  
Black Holes ◽  
Rotating Black Holes ◽  
Electromagnetic Perturbations

scholarly journals Black hole hair removal for N = 4 CHL models

2021 ◽  
Vol 2021 (2) ◽  
Author(s):  
Subhroneel Chakrabarti ◽  
Suresh Govindarajan ◽  
P. Shanmugapriya ◽  
Yogesh K. Srivastava ◽  
Amitabh Virmani
Keyword(s):  
Black Holes ◽  
Black Hole ◽  
Degrees Of Freedom ◽  
Microscopic Analysis ◽  
Flat Space ◽  
Special Care ◽  
Hair Removal ◽  
Partition Functions ◽  
Rotating Black Holes

Abstract Although BMPV black holes in flat space and in Taub-NUT space have identical near-horizon geometries, they have different indices from the microscopic analysis. For K3 compactification of type IIB theory, Sen et al. in a series of papers identified that the key to resolving this puzzle is the black hole hair modes: smooth, normalisable, bosonic and fermionic degrees of freedom living outside the horizon. In this paper, we extend their study to N = 4 CHL orbifold models. For these models, the puzzle is more challenging due to the presence of the twisted sectors. We identify hair modes in the untwisted as well as twisted sectors. We show that after removing the contributions of the hair modes from the microscopic partition functions, the 4d and 5d horizon partition functions agree. Special care is taken to present details on the smoothness analysis of hair modes for rotating black holes, thereby filling an essential gap in the literature.

scholarly journals Quasi-normal modes of electromagnetic perturbations of four-dimensional topological black holes with scalar hair

2006 ◽  
Vol 2006 (10) ◽  
pp. 006-006 ◽  
Author(s):  
George Koutsoumbas ◽  
Suphot Musiri ◽  
Eleftherios Papantonopoulos ◽  
George Siopsis
Keyword(s):  
Black Holes ◽  
Normal Modes ◽  
Scalar Hair ◽  
Electromagnetic Perturbations

scholarly journals Rotating black holes in massive gravity

2014 ◽  
Vol 90 (8) ◽  
Author(s):  
Eugeny Babichev ◽  
Alessandro Fabbri
Keyword(s):  
Black Holes ◽  
Massive Gravity ◽  
Rotating Black Holes

scholarly journals Superradiance Resonance Cavity Outside Rapidly Rotating Black Holes

2000 ◽  
Vol 84 (20) ◽  
pp. 4537-4540 ◽  
Author(s):  
Nils Andersson ◽  
Kostas Glampedakis
Keyword(s):  
Black Holes ◽  
Rotating Black Holes ◽  
Resonance Cavity

scholarly journals Probing the universality of synchronised hair around rotating black holes with Q-clouds

2018 ◽  
Vol 779 ◽  
pp. 151-159 ◽  
Author(s):  
Carlos Herdeiro ◽  
Jutta Kunz ◽  
Eugen Radu ◽  
Bintoro Subagyo
Keyword(s):  
Black Holes ◽  
Rotating Black Holes
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