标题： 跟踪HM Cancri类双星的长期GW相位演化与LISA 显示英文标题

标题： Tracking the Long-Term GW Phase Evolution for HM Cancri-like Binaries with LISA

摘要： 从超紧凑双星HM Cancri的长期X射线和光学数据中，两组研究人员最近测量了其轨道频率的二阶导数。空间引力波（GW）探测器LISA将探测$\sim10^4$银河双星，它们的二阶频率导数将成为LISA有趣的观测目标。在这里，我们预测了针对HM Cancri的引力波信号分析，作为这些众多双星的理想参考系统。我们发现，在其标准运行周期$T\sim4$yr内，LISA不太可能实现对这个双星报告的二阶频率导数的足够测量精度。然而，由于对时间基线有很强的依赖性，通过延长LISA的运行周期或按顺序将其与其他任务（例如太极和天琴）结合，精度将得到显著提高。 显示英文摘要

摘要： From prolonged X-ray and optical data of the ultra-compact binary HM Cancri, two groups recently measured the second derivative of its orbital frequency. The space gravitational wave (GW) detector LISA will detect $\sim10^4$ Galactic binaries and their second frequency derivatives will be interesting observational targets for LISA. Here, we forecast the GW signal analysis for HM Cancri, as an ideal reference system for these numerous binaries. We find that, in its nominal operation period $T\sim4$yr, LISA is unlikely to realize a sufficient measurement precision for the reported second frequency derivative of this binary. However, because of a strong dependence on the time baseline, the precision will be drastically improved by extending the operation period of LISA or combining it with other missions (e.g., Taiji and TianQin) in a sequential order.