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Introduction to 3+1 Numerical Relativity$
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Miguel Alcubierre

Print publication date: 2008

Print ISBN-13: 9780199205677

Published to Oxford Scholarship Online: September 2008

DOI: 10.1093/acprof:oso/9780199205677.001.0001

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GAUGE CONDITIONS

GAUGE CONDITIONS

Chapter:
(p.121) 4 GAUGE CONDITIONS
Source:
Introduction to 3+1 Numerical Relativity
Author(s):

Miguel Alcubierre

Publisher:
Oxford University Press
DOI:10.1093/acprof:oso/9780199205677.003.0004

In the 3+1 formalism, the choice of the coordinate system is given in terms of the gauge variables: the lapse function α and the shift vector βi. However, Einstein's equations say nothing about how the gauge variables should be chosen. This chapter describes the most common gauge conditions used in practice in numerical relativity. Topics covered include slicing conditions, geodesic slicing and focusing, maximal slicing, maximal slices of Schwarzschild, hyperbolic slicing conditions, singularity avoidance for hyperbolic slicing, shift conditions, elliptic shift conditions, evolution type shift conditions, and corotating coordinates.

Keywords:   slicing conditions, maximal slicing, hyberbolic slicing, shift conditions, corotating coordinates

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