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Numerical relativity as a tool for computational astrophysics

✍ Scribed by Edward Seidel; Wai-Mo Suen

Publisher: Elsevier Science
Year: 1999
Tongue: English
Weight: 276 KB
Volume: 109
Category: Article
ISSN: 0377-0427
DOI: 10.1016/s0377-0427(99)00169-7

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✦ Synopsis

The astrophysics of compact objects, which requires Einstein's theory of general relativity for understanding phenomena such as black holes and neutron stars, is attracting increasing attention. In general relativity, gravity is governed by an extremely complex set of coupled, nonlinear, hyperbolic-elliptic partial di erential equations. The largest parallel supercomputers are ÿnally approaching the speed and memory required to solve the complete set of Einstein's equations for the ÿrst time since they were written over 80 years ago, allowing one to attempt full 3D simulations of such exciting events as colliding black holes and neutron stars. In this paper we review the computational e ort in this direction, and discuss a new 3D multi-purpose parallel code called "Cactus" for general relativistic astrophysics. Directions for further work are indicated where appropriate.

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