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Quasi-Normal Modes of Stars and Black Holes
Kostas D. Kokkotas, Bernd G. Schmidt
Perturbations of stars and black holes have been one of the main topics of relativistic astrophysics for the last few decades. They are of particular importance today, because of t…
Nonlinear hydrodynamical evolution of rotating relativistic stars: Numerical methods and code tests
Jose A. Font, Nikolaos Stergioulas, Kostas D. Kokkotas
We present numerical hydrodynamical evolutions of rapidly rotating relativistic stars, using an axisymmetric, nonlinear relativistic hydrodynamics code. We use four different high-…
Construction of Astrophysical Initial Data for Perturbations of Relativistic Stars
Nils Andersson, Kostas D. Kokkotas, Pablo Laguna +2
We develop a framework for constructing initial data sets for perturbations about spherically symmetric matter distributions. This framework facilitates setting initial data repres…
The close-limit approximation to Neutron Star Collisions
G. D. Allen, N. Andersson, K. D. Kokkotas +3
We develop a close-limit approximation to the head-on collision of two neutron stars similar to that used to treat the merger of black hole binaries . This approximation can serve…
On the r-mode spectrum of relativistic stars
H. R. Beyer, K. D. Kokkotas
We present a mathematically rigorous proof that the r-mode spectrum of relativistic stars to the rotational lowest order has a continuous part. A rigorous definition of this spectr…
The inverse problem for pulsating neutron stars: A ``fingerprint analysis'' for the supranuclear equation of state
K. D. Kokkotas, T. A. Apostolatos, N. Andersson
We study the problem of detecting, and infering astrophysical information from, gravitational waves from a pulsating neutron star. We show that the fluid f and p-modes, as well as…