Gravitational-wave extraction from neutron-star oscillations: Comparing linear and nonlinear techniques
Gravitational-wave extraction from neutron-star oscillations: Comparing linear and nonlinear techniques
复制标题
从中子星振荡中提取引力波：比较线性和非线性技术
DOI：
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发表时间：
2008
期刊：
影响因子：
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通讯作者：
A. Nagar
中科院分区：
文献类型：
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作者：
L. Baiotti;S. Bernuzzi;G. Corvino;R. Pietri;A. Nagar
这项研究的主要目的是比较采用不同的数值演化方法和不同的波提取技术的数值模拟得到的重力波形。为此，我们用两种不同的方法发展了一个振荡的、非旋转的、多变的中子星模型：完全的非线性相对论模拟(三维)和基于微扰理论的线性模拟。引力波信号的提取通过三种方法完成：基于Newman-Penrose标量c4的规范不变曲率微扰理论；Schwarzschild时空的规范不变Regge-Wheeler-Zerilli-Moncrief度规微扰理论；四极发射公式的一些推广。DOI：10.1103/PhysRevD.79.024002
The main aim of this study is the comparison of gravitational waveforms obtained from numerical simulations which employ different numerical evolution approaches and different wave-extraction techniques. For this purpose, we evolve an oscillating, nonrotating, polytropic neutron-star model with two different approaches: a full nonlinear relativistic simulation (in three dimensions) and a linear simulation based on perturbation theory. The extraction of the gravitational-wave signal is performed via three methods: the gauge-invariant curvature-perturbation theory based on the Newman-Penrose scalar c 4; the gauge-invariant Regge-Wheeler-Zerilli-Moncrief metric-perturbation theory of a Schwarzschild space-time; some generalization of the quadrupole emission formula. DOI: 10.1103/PhysRevD.79.024002
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