Astrometry holds the potential for testing fundamental physics through the effects of the stochastic gravitational wave background (SGWB) in the $\sim 1–100\mathrm{nHz}$ frequency band on precision measurements of stellar positions. Such measurements are complementary to tests made possible by the detection of the SGWB using pulsar timing arrays. Here, the feasibility of using astrometry for the identification of parity-violating signals within the SGWB is investigated. This is achieved by defining and quantifying a nonvanishing $EB$ correlation function within astrometric correlation functions and investigating how one might estimate the detectability of such signals.

中文翻译：

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用天体测量学探测随机引力波背景中的宇称不守恒

天体测量学具有通过随机引力波背景（SGWB）的影响来测试基础物理的潜力。$～1–100\mathrm{赫兹}$恒星位置精确测量的频段。此类测量是对使用脉冲星定时阵列检测 SGWB 进行的测试的补充。在这里，研究了使用天体测量学来识别 SGWB 内宇称破坏信号的可行性。这是通过定义和量化非零来实现的$乙乙$天体测量相关函数中的相关函数，并研究如何估计此类信号的可检测性。