环双星小行星带的脉冲星计时特征
Pulsar Timing Signatures of Circumbinary Asteroid Belts
摘要：
大量小行星的引力对脉冲星的运动产生了一定程度的扰动，这种扰动可以通过毫秒脉冲星的精确计时来检测。其结果是一个低频的相关噪声过程，其形式类似于已知影响正则中微子的红色定时噪声，或来自随机引力波背景的预期信号。受观察到的事实，许多毫秒脉冲星是在二进制系统的动机，我们描述的方式，其中存在的脉冲星的二进制同伴会影响小行星带产生的信号。伴星的主要作用是破坏最短周期轨道的稳定性，切断来自小行星带的信号的高频成分。我们还讨论了小行星带的引力波搜索工作的影响。与来自随机引力波背景的信号相比，小行星带噪声具有相似的频率和幅度，并且同样与射频无关，但在不同的小行星之间不相关，这应该允许区分这两种信号。
英文摘要：
The gravitational pull of a large number of asteroids perturbs a pulsar's motion to a degree that is detectable through precision timing of millisecond pulsars. The result is a low-frequency, correlated noise process, similar in form to the red timing noise known to affect canonical pulsars, or to the signal expected from a stochastic gravitational-wave background. Motivated by the observed fact that many millisecond pulsars are in binary systems, we describe the ways in which the presence of a binary companion to the pulsar would affect the signal produced by an asteroid belt. The primary effect of the companion is to destabilize the shortest-period orbits, cutting off the high-frequency component of the signal from the asteroid belt. We also discuss the implications of asteroid belts for gravitational-wave search efforts. Compared to the signal from a stochastic gravitational-wave background, asteroid belt noise has a similar frequency and amplitude, and is similarly independent of radio frequency, but is not correlated between different pulsars, which should allow the two kinds of signal to be distinguished.
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