Spectral approach to axisymmetric evolution of Einstein's equations
Spectral approach to axisymmetric evolution of Einstein's equations
复制标题
爱因斯坦方程轴对称演化的谱方法
DOI:
10.1088/1742-6596/600/1/012060
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发表时间:
2015
期刊:
影响因子:
--
通讯作者:
Schell
中科院分区:
文献类型:
--
作者:
Schell
We present a new formulation of Einstein's equations for an axisymmetric spacetime with vanishing twist in vacuum. We propose a fully constrained scheme and use spherical polar coordinates. A general problem for this choice is the occurrence of coordinate singularities on the axis of symmetry and at the origin. Spherical harmonics are manifestly regular on the axis and hence take care of that issue automatically. In addition a spectral approach has computational advantages when the equations are implemented. Therefore we spectrally decompose all the variables in the appropriate harmonics. A central point in the formulation is the gauge choice. One of our results is that the commonly used maximal-isothermal gauge turns out to be incompatible with tensor harmonic expansions, and we introduce a new gauge that is better suited. We also address the regularisation of the coordinate singularity at the origin.
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DOI:
10.1088/1742-6596/314/1/012015
发表时间:
2011
期刊:
Journal of Physics: Conference Series
影响因子:
--
作者:
S. Dain
通讯作者:
S. Dain
影响因子:
2.8
作者:
N. Johansen;F. Ravndal
通讯作者:
F. Ravndal
影响因子:
3.5
作者:
C. Gundlach;J. Martin;D. Garfinkle
通讯作者:
D. Garfinkle
影响因子:
3.5
作者:
O. Rinne
通讯作者:
O. Rinne
影响因子:
5
作者:
D. Garfinkle;G. C. Duncan
通讯作者:
G. C. Duncan