A Combined Spectral/Godunov Code for the Simulation of Gravitational Waves from Stellar Supernova Core Collapse

Details A Combined Spectral/Godunov Code for the Simulation of Gravitational Waves from Stellar Supernova Core Collapse A Combined Spectral/Godunov Code for the Simulation of Gravitational Waves from Stellar Supernova Core Collapse

Apr 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008aspc..385..127n&link_type=abstract

Numerical Modeling of Space Plasma Flows: Astronum 2007 ASP Conference Series, Vol. 385, proceedings of the conference held 10-1

Astronomy and Astrophysics

Astronomy

Scientific paper

Supernovae represent powerful sources of gravitational radiation. Their numerical simulation, even of simplified core collapse models, requires numerical techniques that are able to handle strong hydrodynamic shocks and a general-relativistic gravitational field. Such hydrodynamics can be modeled with high-resolution shock-capturing (HRSC) schemes, also known as Godunov schemes, in general relativity, while the Einstein equations for the gravitational field may require much computer power, if solved in the same way. It is therefore interesting to use spectral methods to model the gravitational field, which is always regular enough to avoid any Gibbs phenomenon, in conjunction with HRSC schemes for the hydrodynamics equations. We present such a code combining both methods to model stellar core collapse simulations and the resulting gravitational waves, with the most recent equations of state and a simplified neutrino treatment. Some additional results on neutron star oscillations are also shown.

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