The gravitational wave strain in the characteristic formalism of numerical relativity
The gravitational wave strain in the characteristic formalism of numerical relativity
复制标题
数值相对论特征形式中的引力波应变
DOI：
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发表时间：
2013
期刊：
影响因子：
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通讯作者：
C. Reisswig
中科院分区：
文献类型：
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作者：
N. Bishop;C. Reisswig
引力波信号的提取，在一个特征的数值演化的上下文中被重新审视。引力波应变的公式被开发和测试，并作为爱因斯坦工具包中PITT代码的一部分公开提供。使用新的应变公式，我们表明，人工非线性漂移固有的时间积分波形的情况下，可以减少一个二元黑洞合并配置。然而，对于快速旋转的恒星核心坍缩模型的测试情况，我们发现漂移必须有不同的根源。
The extraction of the gravitational wave signal, within the context of a characteristic numerical evolution is revisited. A formula for the gravitational wave strain is developed and tested, and is made publicly available as part of the PITT code within the Einstein Toolkit. Using the new strain formula, we show that artificial non-linear drifts inherent in time integrated waveforms can be reduced for the case of a binary black hole merger configuration. For the test case of a rapidly spinning stellar core collapse model, however, we find that the drift must have different roots.