Prospects for gravitational-wave polarization tests from compact binary mergers with future ground-based detectors
Prospects for gravitational-wave polarization tests from compact binary mergers with future ground-based detectors
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DOI：
10.1103/physrevd.100.042001
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发表时间：
2019-04
影响因子：
5
通讯作者：
H. Takeda;A. Nishizawa;K. Nagano;Y. Michimura;K. Komori;M. Ando;K. Hayama
中科院分区：
文献类型：
--
作者：
H. Takeda;A. Nishizawa;K. Nagano;Y. Michimura;K. Komori;M. Ando;K. Hayama
广义度量引力理论中存在六种可能的引力波偏振模，而广义相对论中允许两种张量偏振模。偏振模式的性质和数量取决于重力理论。探测器的数量需要等于引力波偏振模式的数量基本上是为了分离偏振。然而，由于来自紧凑双星的长GW信号和地球自转，单个探测器在较低频率下具有很高的灵敏度，可以有效地视为一个虚拟探测器网络，其中包括沿其轨迹的一组探测器。因此，时变的天线方向图函数可以帮助测试引力波的极化。我们研究了地球自转对偏振测试的影响，并展示了未来使用爱因斯坦望远镜和宇宙探索者等地面引力探测器观测紧凑双星合并时测试非张量偏振模式的可能性。
There exist six possible polarization modes of gravitational waves in general metric theory of gravity, while two tensor polarization modes are allowed in general relativity. The properties and number of polarization modes depend on gravity theories. The number of the detectors needs to be equal to the number of the polarization modes of the gravitational waves for separation of polarizations basically. However, a single detector having great sensitivity at lower frequency could be effectively regarded as a virtual detector network including a set of detectors along its trajectory due to a long GW signal from a compact binary and the Earth's rotation. Thus, time-varying antenna pattern functions can help testing the polarizations of gravitational waves. We study the effects of the Earth's rotation on the polarization test and show a possibility to test the non-tensorial polarization modes from future observations of compact binary mergers with ground-based gravitational detectors such as Einstein telescope and Cosmic Explorer.