Astronomy and Astrophysics – Astrophysics – General Relativity and Quantum Cosmology
Scientific paper
2008-11-11
Phys.Rev.D79:044026,2009
Astronomy and Astrophysics
Astrophysics
General Relativity and Quantum Cosmology
to appear in Physical Review D
Scientific paper
10.1103/PhysRevD.79.044026
The gauge polyvalence of a new numerical code is tested, both in harmonic-coordinate simulations (gauge-waves testbed) and in singularity-avoiding coordinates (simple Black-Hole simulations, either with or without shift). The code is built upon an adjusted first-order flux-conservative version of the Z4 formalism and a recently proposed family of robust finite-difference high-resolution algorithms. An outstanding result is the long-term evolution (up to 1000M) of a Black-Hole in normal coordinates (zero shift) without excision.
Alic Daniela
Bona Carles
Bona-Casas Carles
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