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arXiv 2201.08785gr-qcastro-ph.HE
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在LIGO-Virgo第三次观测运行期间对来自故障星的长持续时间瞬态引力波的搜索设置

Search setup for long-duration transient gravitational waves from glitching pulsars during LIGO-Virgo third observing run

Luana M. Modafferi, Joan Moragues, David Keitel, LIGO Scientific Collaboration, Virgo Collaboration, KAGRA Collaboration

摘要:

脉冲星是旋转的中子星,它发出电磁束。我们希望双星会慢慢降低它们的旋转频率。然而,突然增加的旋转频率已被观察到从不同的恒星。这些事件被称为“小故障”,随后是一个放松阶段,时间从几天到几个月不等。引力波(GW)的发射可能遵循这些特殊的事件。我们给出了一个概述的设置GW数据的分析从先进的LIGO和处女座第三次观测运行(O3)arXiv:2112.10990搜索瞬态GW信号持续数小时至数月后,在已知的卫星故障。该搜索方法包括放置一个模板网格在频率旋转降频空间与固定的网格间距。然后,对于每个点,我们计算瞬态F统计量,该统计量在一组瞬态参数(如电位信号的持续时间和开始时间)上最大化。然后设置检测统计量的阈值,并且我们在每个候选者的参数空间上搜索峰值。

英文摘要:

Pulsars are spinning neutron stars which emit an electromagnetic beam. We expect pulsars to slowly decrease their rotational frequency. However, sudden increases of the rotational frequency have been observed from different pulsars. These events are called "glitches" and they are followed by a relaxation phase with timescales from days to months. Gravitational wave (GW) emission may follow these peculiar events. We give an overview of the setup for an analysis of GW data from the Advanced LIGO and Virgo third observing run (O3) arXiv:2112.10990 searching for transient GW signals lasting hours to months after glitches in known pulsars. The search method consists of placing a template grid in frequency-spindown space with fixed grid spacings. Then, for each point we compute the transient F-statistic which is maximized over a set of transient parameters like the duration and start time of the potential signals. A threshold on the detection statistic is then set, and we search for peaks over the parameter space for each candidate.

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