论文标题
太空传播引力波检测器的敏感性功能
Sensitivity functions for space-borne gravitational wave detectors
论文作者
论文摘要
提出时间延迟干涉法以通过以不同的数据组合来取消大型激光相噪声来提高太空传播引力波检测器的信噪比。基于迈克尔逊数据组合，可以通过平均全天空波源位置获得检测器的灵敏度函数。目前，有两种主要方法将重力波信号编码为检测器。一种是根据重力波框架的臂方向来适应重力波偏振角，另一个是将重力波信号分为检测器框架中的加分和交叉极化。尽管有一些尝试使用第一种方法来提供灵敏度函数的分析表达，但只能获得半分析。在这里，从第二种方法开始，我们证明了这两种方法的等效性。首次获得灵敏度函数的完整分析表达，这提供了快速准确的均值，以评估和比较不同太空传播探测器的性能，例如Lisa和Tianqin。
Time-delay interferometry is put forward to improve the signal-to-noise ratio of space-borne gravitational wave detectors by canceling the large laser phase noise with different combinations of measured data. Based on the Michelson data combination, the sensitivity function of the detector can be obtained by averaging the all-sky wave source positions. At present, there are two main methods to encode gravitational wave signal into detector. One is to adapt gravitational wave polarization angle depending on the arm orientation in the gravitational wave frame, and the other is to divide the gravitational wave signal into plus and cross polarizations in the detector frame. Although there are some attempts using the first method to provide the analytical expression of sensitivity function, only a semianalytical one could be obtained. Here, starting with the second method, we demonstrate the equivalence of both methods. First time to obtain the full analytical expression of sensitivity function, which provides a fast and accurate mean to evaluate and compare the performance of different space-borne detectors, such as LISA and TianQin.
