Transient gravitational waves from pulsar post-glitch recoveries
Transient gravitational waves from pulsar post-glitch recoveries
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DOI：
10.1093/mnras/staa2534
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发表时间：
2020-07
影响因子：
4.8
通讯作者：
G. Yim;David Jones
中科院分区：
文献类型：
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作者：
G. Yim;David Jones
本研究探讨了中子星星（NS）山的引力波（GW）是否可以用目前的第二代和未来的第三代GW探测器探测到。特别是，我们专注于一种情况下，瞬态山后立即形成NS故障。在毛刺中，NS的自旋频率突然增加，然后通常以指数方式恢复到毛刺之前的自旋频率，但从未完全达到毛刺之前的自旋频率。如果恢复归因于由于瞬态山引起的额外扭矩，我们发现来自该山的GW在设计灵敏度下可以用先进的LIGO边缘检测到，并且很可能被第三代探测器（如爱因斯坦望远镜）检测到。使用这个模型，我们能够找到GW的振幅和持续时间的观测值的解析表达式。
This work explores whether gravitational waves (GWs) from neutron star (NS) mountains can be detected with current 2nd-generation and future 3rd-generation GW detectors. In particular, we focus on a scenario where transient mountains are formed immediately after a NS glitch. In a glitch, a NS's spin frequency abruptly increases and then often exponentially recovers back to, but never quite reaches, the spin frequency prior to the glitch. If the recovery is ascribed to an additional torque due to a transient mountain, we find that GWs from that mountain are marginally-detectable with Advanced LIGO at design sensitivity and is very likely to be detectable for 3rd-generation detectors such as the Einstein Telescope. Using this model, we are able to find analytical expressions for the GW amplitude and its duration in terms of observables.