Measuring Parity Asymmetry of Gravitational Wave Backgrounds with a Heliocentric Detector Network in the mHz Band
Measuring Parity Asymmetry of Gravitational Wave Backgrounds with a Heliocentric Detector Network in the mHz Band
复制标题
使用 mHz 波段日心探测器网络测量引力波背景的宇称不对称性
DOI：
10.1103/physrevlett.125.251101
复制
发表时间：
2020
影响因子：
8.6
通讯作者：
Seto Naoki
中科院分区：
文献类型：
--
作者：
Sekiguchi Toyokazu;Takahashi Tomo;石井貴昭;Seto Naoki
我们通过相关分析讨论了在1 MHz附近对各向同性引力波背景的探索，目标是宇称奇模和偶极化模。尽管由于取消计划，空间干涉仪LISA一人无法探测到这两种模式，但随着太极等其他空间探测器的强劲发展，前景正在发生巨大变化。事实上，日心干涉仪网络可以保持较好的几何对称性，由偏离太阳中心的虚拟球体照明。通过利用数据流的内部对称性，我们可以在相关分析中对奇偶奇偶校验模式进行最佳分解。通过同时使用Lisa和太极十年，我们对这两种模式的灵敏度可以达到归一化能量密度。
We discuss exploration for isotropic gravitational wave backgrounds around 1 mHz by correlation analysis, targeting both parity odd and even polarization modes. Even though the space interferometer LISA alone cannot probe the two modes due to cancellations, the outlook is being changed drastically by the strong development of other space detectors such as Taiji. In fact, a heliocentric interferometer network can hold a preferable geometrical symmetry illuminated by a virtual sphere off-center from the Sun. By utilizing an internal symmetry of data streams, we can optimally decompose the odd and even parity modes at the correlation analysis. By simultaneously using LISA and Taiji for ten years, our sensitivity to the two modes could reachin terms of the normalized energy density.