具有最少零频的时间延迟干涉测量
Time delay interferometry with minimal null frequencies
AI总结：
本文提出hybrid Relay第二代TDI构型，将特征频率降至Michelson观测量的四分之一，并通过噪声抑制测试与大质量黑洞双星信号参数推断验证其数据分析稳健性。
摘要：
时间延迟干涉测量（TDI）是引力波（GW）空间任务中采用的一项关键技术，它通过组合多条激光链路并建立等效的等臂干涉测量来抑制激光频率噪声。当合成激光链路中的周期性信号/噪声被抵消时，噪声谱和引力波响应中会引入零频。这些频率是TDI的特征频率（CFs），与其组合的几何结构有关。在本工作中，我们实施了一种称为hybrid Relay的第二代TDI构型，以进行噪声抑制和数据分析，其特征频率仅为基准第二代Michelson观测量的四分之一。我们考察了该TDI构型在激光噪声抵消和时钟噪声抑制方面的性能，并论证了其基本能力。为评估其在信号提取方面的稳健性，我们模拟了包含大质量黑洞双星引力波信号的数据，并进行参数推断，同时与基准Michelson TDI构型进行比较。结果表明，这一替代TDI方案在完成数据分析方面可能比Michelson更稳健。
英文摘要：
Time delay interferometry (TDI) is a key technique employed in gravitational wave (GW) space missions to mitigate laser frequency noise by combining multiple laser links and establishing an equivalent equal arm interferometry. The null frequencies will be introduced in noise spectra and GW response when the periodical signal/noise is canceled in synthesized laser links. These frequencies are characteristic frequencies (CFs) of a TDI which related to its geometry of combination. In this work, we implement a second-generation TDI configuration referred to as hybrid Relay to perform noise suppressions and data analysis, whose CFs are only one-quarter that of the fiducial second-generation Michelson observables. We examine the performance of TDI configuration in laser noise cancellation and clock noise suppression and justify its essential capabilities. To assess its robustness for signal extraction, we simulate data containing GW signals from massive black hole binaries and perform parameter inferences with comparisons against the fiducial Michelson TDI configuration. The results demonstrate that the alternative TDI solution could be more robust than Michelson in fulfilling data analysis.
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