New approach to calculating the news

被引：33

作者：

Bishop, NT ^{[1
]}

Deshingkar, SS ^{[1
]}

机构：

[1] Univ S Africa, Dept Math Appl Math & Astron, ZA-0003 Unisa, South Africa

来源：

PHYSICAL REVIEW D | 2003年 / 68卷 / 02期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevD.68.024031

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We consider the problem of finding the gravitational radiation output, or news, within the context of a numerical simulation of a spacetime by means of the null-cone, or characteristic, approach to numerical relativity. We develop a method for computing the news that uses an explicit coordinate transformation to a coordinate system that satisfies the Bondi conditions. The method has been implemented computationally. We present results of applying the method to certain test problems, demonstrating second order convergence of the news to the analytic value.

引用

页数：6

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