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Bayesian timing analysis of giant flare of SGR 1806-20 by RXTE PCA
V. Hambaryan, R. Neuhaeuser, K. D. Kokkotas
By detecting high frequency quasi-periodic oscillations (QPOs) and estimating frequencies of them during the decaying tail of giant flares from Soft Gamma-ray Repeaters (SGRs) usef…
Sensitivity Studies for Third-Generation Gravitational Wave Observatories
S. Hild, M. Abernathy, F. Acernese +136
Advanced gravitational wave detectors, currently under construction, are expected to directly observe gravitational wave signals of astrophysical origin. The Einstein Telescope, a…
Magnetars oscillations in the presence of a crust
Antonella Colaiuda, Kostas D. Kokkotas
We study axisymmetric perturbations of neutron star endowed with a strong magnetic field (magnetars), considering the coupled oscillations of the fluid core with the solid crust. W…
Quasinormal modes, scattering and Hawking radiation of Kerr-Newman black holes in a magnetic field
K. D. Kokkotas, R. A. Konoplya, A. Zhidenko
We perform a comprehensive analysis of the spectrum of proper oscillations (quasinormal modes), transmission/reflection coefficients and Hawking radiation for a massive charged sca…
High-order perturbations of a spherical collapsing star
David Brizuela, Jose M. Martin-Garcia, Ulrich Sperhake +1
In Ref. [1, 2] a formalism to deal with high-order perturbations of a general spherical background was developed. In this article, we apply it to the particular case of a perfect f…
Quasi-normal modes, bifurcations and non-uniqueness of charged scalar-tensor black holes
Daniela D. Doneva, Stoytcho S. Yazadjiev, Kostas D. Kokkotas +1
In the present paper we study the scalar sector of the quasinormal modes of charged general relativistic, static and spherically symmetric black holes coupled to nonlinear electrod…