Searching for bispectrum of stochastic gravitational waves with pulsar timing arrays
Searching for bispectrum of stochastic gravitational waves with pulsar timing arrays
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DOI：
10.1088/1475-7516/2019/03/032
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发表时间：
2018-12
影响因子：
6.4
通讯作者：
Makoto Tsuneto;Asuka Ito;Toshifumi Noumi;J. Soda
中科院分区：
文献类型：
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作者：
Makoto Tsuneto;Asuka Ito;Toshifumi Noumi;J. Soda
研究了如何利用脉冲星定时阵列探测随机引力波的双谱。双谱是探索随机引力波起源的关键。特别是，双谱的形状携带了暴胀模型的宝贵信息。我们表明，一个适当的三点相关滤波函数使我们能够在双谱中提取动量三角形的特定配置。我们还计算了重叠缩减函数，并讨论了多脉冲星双谱探测策略。
We study how to probe bispectra of stochastic gravitational waves with pulsar timing arrays. The bispectrum is a key to probe the origin of stochastic gravitational waves. In particular, the shape of the bispectrum carries valuable information of inflation models. We show that an appropriate filter function for three point correlations enables us to extract a specific configuration of momentum triangles in bispectra. We also calculate the overlap reduction functions and discuss strategy for detecting the bispectrum with multiple pulsars.