标题： 快速且稀疏：来自快速致密天体的随机二进制扰动 显示英文标题

标题： Fast and Fewrious: Stochastic binary perturbations from fast compact objects

摘要： 大质量致密天体会使双星系统变软。 这一过程已被用于数十年来限制这类天体的种群，尤其是作为暗物质（DM）的一个组成部分。 轻质量致密天体的影响，例如那些在未受约束的小行星质量范围内的天体，通常被忽略了。 原则上，低能扰动者可以硬化双星系统而不是使其变软，但通常认为当扰动者的速度相对于双星轨道速度较大时，这种效应会消失，这在DM成分中是常见的。 在这里，我们重新计算由轻扰动者引起的硬化率。 我们表明，尽管多次相遇中的扰动平均为零，但对DM约束感兴趣的许多情况处于方差不能忽略的区域。 我们表明，几个快速移动的扰动者可以在以极高精度测量的系统中留下随机扰动，并利用这个框架重新审视诸如双脉冲星系统和太阳系等系统的约束潜力。 这开启了一类新的动态探测方法，可能应用于小行星质量的DM候选者。 显示英文摘要

摘要： Massive compact objects soften binaries. This process has been used for decades to constrain the population of such objects, particularly as a component of dark matter (DM). The effects of light compact objects, such as those in the unconstrained asteroid-mass range, have generally been neglected. In principle, low-energy perturbers can harden binaries instead of softening them, but the standard lore is that this effect vanishes when the perturber velocities are large compared to the binary's orbital velocity, as is typical for DM constituents. Here, we revisit the computation of the hardening rate induced by light perturbers. We show that although the perturbations average to zero over many encounters, many scenarios of interest for DM constraints are in the regime where the variance cannot be neglected. We show that a few fast-moving perturbers can leave stochastic perturbations in systems that are measured with great precision, and we use this framework to revisit the constraint potential of systems such as binary pulsars and the Solar System. This opens a new class of dynamical probes with potential applications to asteroid-mass DM candidates.