6 papers
Non-linear radial oscillations of neutron stars: Mode-coupling results
Uli Sperhake, Philippos Papadopoulos, Nils Andersson
The non-linear behaviour of oscillation modes in compact stars is a topic of considerable current interest. Accurate numerical studies of such phenomena are likely to require power…
Characteristic numerical relativity applied to hydrodynamic studies of neutron stars
F. Siebel, J. A. Font, E. Mueller +1
We present tests and results of a new axisymmetric, fully general relativistic code capable of solving the coupled Einstein-matter system for a perfect fluid matter field. Our impl…
Analysis of relativistic hydrodynamics in conservation form
Philippos Papadopoulos, Jose A. Font
Formulations of Eulerian general relativistic ideal hydrodynamics in conservation form are analyzed in some detail, with particular emphasis to geometric source terms. Simple linea…
Numerical simulations of relativistic wind accretion on to black holes using Godunov-type methods
Jose A. Font, Jose M. Ibanez, Philippos Papadopoulos
We have studied numerically the so-called Bondi-Hoyle (wind) accretion on to a rotating (Kerr) black hole in general relativity. We have used the Kerr-Schild form of the Kerr metri…
Numerical hydrodynamics on light cones
Jose A Font, Philippos Papadopoulos
Characteristic methods show excellent promise in the evolution of single black hole spacetimes. The effective coupling with matter fields may help the numerical exploration of impo…
Dynamics of spin-2 fields in Kerr background geometries
W. Krivan, P. Laguna, P. Papadopoulos
We have developed a numerical method for evolving perturbations of rotating black holes. Solutions are obtained by integrating the Teukolsky equation written as a first-order in ti…