利用引力波观测台四面体星座进行引力波偏振探测
Gravitational Wave Polarization Detection with Tetrahedron Constellation of Gravitational Wave Observatory
AI总结：
本文首次提出由四颗航天器组成的引力波观测台四面体星座TEGO，利用时间延迟干涉测量抑制噪声，其六条臂可同时探测引力波六种偏振模式，从而能够直接发现广义相对论未预测的标量纵向偏振模式。
摘要：
我们首次提出了由四艘相同航天器（S/Cs）组成的引力波观测台四面体星座（TEGO）。激光望远镜及其指向结构安装在S/C平台上，并均匀分布在相隔120度的三个位置。这些结构自动为平台形成了一个稳定的质心。使用时间延迟干涉测量（TDI）来抑制引力波（GW）探测器的频率噪声。基于TEGO配置，不等臂迈克尔逊TDI配置和Sagnac TDI配置在消除激光频率噪声方面同样有效。此外，与LISA、Taiji和TianQin的配置相比，TEGO在其对GW信号敏感的TDI系统中具有更多的光路组合。TEGO的六条臂同时对GW的六种偏振模式敏感。这种敏感性意味着可以直接探测到广义相对论（GR）预测之外的GW模式。例如，GR未预测到的GW标量纵向模式已被确定为主要偏振分量。发现该模式在TEGO臂的响应幅度中很明显，例如在特定轨道位置下S/C1与S/C4之间，以及S/C3与S/C4之间。
英文摘要：
For the first time, we have introduced the Tetrahedron Constellation of Gravitational Wave Observatory (TEGO) composed of four identical spacecrafts (S/Cs). The laser telescopes and their pointing structures are mounted on the S/C platform and are evenly distributed at three locations 120 degrees apart. These structures form automatically a stable mass center for the platform. The time delay interferometry (TDI) are used to suppress the frequency noise of Gravitational Wave (GW) detector. The unequal arm Michelson TDI configuration and the Sagnac TDI configuration are equally effective at eliminating the laser frequency noise based on the TEGO configuration. Furthermore, comparing to the configurations of LISA, Taiji, and TianQin, the TEGO has more combinations of optical paths in its TDI system sensitive to GW signals. The six arms of TEGO are simultaneously sensitive to the six polarization modes of GWs. The sensitivity implies that GW modes beyond the predictions of general relativity (GR) can be detected directly. For instance, a scalar longitudinal mode of GWs, which is not predicted by GR, has been identified as a dominant polarization component. This mode is found to be evident in the response amplitudes of the TEGO arms, such as between S/C1 and S/C4, and S/C3 and S/C4, at certain orbital positions.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
