Astronomy and Astrophysics – Astrophysics – General Relativity and Quantum Cosmology
Scientific paper
1994-12-22
Phys.Rev. D51 (1995) 1639-1645
Astronomy and Astrophysics
Astrophysics
General Relativity and Quantum Cosmology
12 pages, LaTeX with RevTeX 3.0 macros, 4 uuencoded gz-compressed postscript figures. Also available at http://jean-luc.ncsa.u
Scientific paper
10.1103/PhysRevD.51.1639
Spherically symmetric (1D) black-hole spacetimes are considered as a test for numerical relativity. A finite difference code, based in the hyperbolic structure of Einstein's equations with the harmonic slicing condition is presented. Significant errors in the mass function are shown to arise from the steep gradient zone behind the black hole horizon, which challenge the Computational Fluid Dynamics numerical methods used in the code. The formalism is extended to moving numerical grids, which are adapted to follow horizon motion. The black hole exterior region can then be modeled with higher accuracy.
Bona Carles
Masso Joan
Stela Joan
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