直接加速：宇宙和系外行星的协同作用
Direct Acceleration: Cosmic and Exoplanet Synergies
摘要：
直接测量加速度是宇宙学和系外行星的一个关键科学目标。对于宇宙学来说，红移漂移的概念（到21世纪20年代已经有60多年的历史）可以直接建立弗里德曼-勒马-罗伯逊-沃克模型。结合宇宙微波背景测量，它将使暗能量的优值比第四阶段实验增加3倍。对于系外行星，所需的相同技术提供了前所未有的径向速度精度，从而能够在宜居带中探测地球质量的行星。其他科学案例包括绘制银河系引力势和测试其暗物质分布。
英文摘要：
Direct measurement of acceleration is a key scientific goal for both cosmology and exoplanets. For cosmology, the concept of redshift drift (more than 60 years old by the 2020s) could directly establish the Friedmann-Lema{\^ı}tre-Robertson-Walker model. It would increase the dark energy figure of merit by a factor of 3 beyond Stage 4 experiments, in combination with cosmic microwave background measurements. For exoplanets, the same technology required provides unprecedented radial velocity accuracy, enabling detection of Earth mass planets in the habitable zone. Other science cases include mapping the Milky Way gravitational potential and testing its dark matter distribution.
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