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Two-dimensional twistor manifolds and Teukolsky operators
(Springer, 2020-10)
The Teukolsky equations are currently the leading approach for analysing stability of linear massless fields propagating in rotating black holes. It has recently been shown that the geometry of these equations can be ...
Eigenvalue for angular Teukolsky equation via accessory parameter for Painlevé V
(Universidade Federal de PernambucoUFPEBrasilPrograma de Pos Graduacao em Fisica, 2019)
Conformal invariance, complex structures and the Teukolsky connection
(IOP Publishing, 2018-07-23)
We show that the Teukolsky connection, which defines generalized wave operators governing the behavior of massless fields on Einstein spacetimes of Petrov type D, has its origin in a distinguished conformally and GHP ...
A matrix method for quasinormal modes: Kerr and Kerr-Sen black holes
(World Scientific Publ Co Pte Ltd, 2017-08-20)
In this paper, a matrix method is employed to study the scalar quasinormal modes of Kerr as well as Kerr-Sen black holes. Discretization is applied to transfer the scalar perturbation equation into a matrix form eigenvalue ...
Generalized wave operators, weighted Killing fields, and perturbations of higher dimensional spacetimes
(IOP Publishing, 2018-03-09)
We present weighted covariant derivatives and wave operators for perturbations of certain algebraically special Einstein spacetimes in arbitrary dimensions, under which the Teukolsky and related equations become weighted ...
Oscilações de buracos negrosBlack hole oscillations
([s.n.], 2005)
Relativistic kinetic theory with applications in astrophysics
(Universidad Michoacana de San Nicolás de Hidalgo, 2019-02)
This thesis is based on a description of processes of accretion of matter towards black holes. The matter model that is used is a relativistic kinetic gas, which is based on a description through the one-particle distribution ...
Instabilities in Kerr spacetimes
(World Scientific, 2011-12)
We present a generalization of previous results regarding the stability under gravitational perturbations of nakedly singular super extreme Kerr spacetime and Kerr black hole interior beyond the Cauchy horizon. To do so ...