论文标题
来自中子星的小旋转和旋转事件的重力波
Gravitational waves from small spin-up and spin-down events of neutron stars
论文作者
论文摘要
最近有报道说，有大量的“小故障候选者”和“抗glitch候选者”，它们实际上是小的旋转和旋转的中子恒星的旋转，其大小小于典型的小故障中的大小。这些小事件的物理起源尚不清楚。在本文中，我们概述了一个模型，该模型可以用重力波观测来独立测试自旋的变化。简而言之，该模型认为，小型旋转/旋转事件是由非轴对称$ f $ - 模型的激发和衰减引起的，它们在引力波时以突发的方式辐射角动量。该模型将自旋频率的变化作为输入，并输出初始模式幅度以及可以从重力波检测器中实现的信噪比。我们发现，一旦第三代重力波检测器（例如爱因斯坦望远镜和宇宙探险家）开始获取数据，此处介绍的模型将成为可伪造的。
It was recently reported that there exists a population of "glitch candidates" and "anti-glitch candidates" which are effectively small spin-ups and spin-downs of a neutron star with magnitudes smaller than those seen in typical glitches. The physical origin of these small events is not yet understood. In this paper, we outline a model that can account for the changes in spin, and crucially, is independently testable with gravitational wave observations. In brief, the model posits that small spin-up/spin-down events are caused by the excitation and decay of non-axisymmetric $f$-modes which radiate angular momentum away in a burst-like way as gravitational waves. The model takes the change in spin frequency as an input and outputs the initial mode amplitude and the signal-to-noise ratio achievable from gravitational wave detectors. We find that the model presented here will become falsifiable once 3rd generation gravitational wave detectors, like the Einstein Telescope and Cosmic Explorer, begin taking data.
