Extraction of gravitational waves in numerical relativity
Extraction of gravitational waves in numerical relativity
复制标题
数值相对论中引力波的提取
DOI：
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发表时间：
2016
影响因子：
40.6
通讯作者：
L. Rezzolla
中科院分区：
文献类型：
--
作者：
N. Bishop;L. Rezzolla
数值相对论计算通常会得到爱因斯坦方程的解，其中也包括辐射部分，实际上是在有限范围内计算的。由于引力波仅在零点无穷远和适当的坐标系中被适当地定义，因此对发射的引力波的准确估计是数值相对论中的一个古老而不是微不足道的问题。多年来，已经发展了许多方法来从数值模拟中提取解的辐射部分，这些方法包括：四极公式、规范不变度规微扰、Weyl标量和特征提取。我们从理论背景和实施两个方面对每种方法进行了回顾和讨论。最后，我们对各种方法的内在优缺点进行了简要的比较。
A numerical-relativity calculation yields in general a solution of the Einstein equations including also a radiative part, which is in practice computed in a region of finite extent. Since gravitational radiation is properly defined only at null infinity and in an appropriate coordinate system, the accurate estimation of the emitted gravitational waves represents an old and non-trivial problem in numerical relativity. A number of methods have been developed over the years to “extract” the radiative part of the solution from a numerical simulation and these include: quadrupole formulas, gauge-invariant metric perturbations, Weyl scalars, and characteristic extraction. We review and discuss each method, in terms of both its theoretical background as well as its implementation. Finally, we provide a brief comparison of the various methods in terms of their inherent advantages and disadvantages.
影响因子：
8.6
作者：
H. Dimmelmeier;C. Ott;H.-Th. Janka;A. Marek;E. Müller
通讯作者：
E. Müller
双中子星模拟中 Z4 系统共形和协变公式的约束阻尼
影响因子：
5
作者：
Daniela Alic;Wolfgang Kastaun;Luciano Rezzolla
通讯作者：
Luciano Rezzolla