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arXiv 2108.01050gr-qcastro-ph.HE
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利用引力波爆发搜索探测高偏心双星的方法

Method for detecting highly-eccentric binaries with a gravitational wave burst search

Belinda D. Cheeseboro, Paul T. Baker

摘要:

从高偏心双星黑洞(BBH)系统中探测到引力波(GW)可以深入了解它们的动力学和形成过程。到目前为止,所有的LIGO-Virgo BBH探测都是在最初发现时使用准圆形模板进行的。然而,最近的研究发现,其中一些系统与LIGO波段的高偏心率$e_{10 \textrm{Hz}} > 0.1$兼容,可能指向一个具有挑战性的源群。目前使用的低延迟搜索方法与地面GW探测器数据没有很好地装备检测高度偏心源。基于模板的匹配滤波器搜索需要精确的偏心波形模型,这是计算昂贵的。未建模的突发搜索被设计为检测局部过量功率,并且无法识别多个孤立的突发,因为这将源自单个高度偏心的BBH。因此,我们提出了一个基于信号的先验,可以纳入现有的GW突发搜索目标高度偏心BBH。我们的偏心爆发先验是基于Loutrel & Yunes(2017)描述的牛顿爆发模型。作为概念的证明,我们测试我们的方法对模拟数据,并发现,对于中间SNR $\sim3-6$信号使用偏心突发前更有效地定位GW突发相比,一个统一的前。

英文摘要:

Detection of gravitational waves (GW) from highly eccentric binary black hole (BBH) systems can provide insight into their dynamics and formation. To date, all of the LIGO-Virgo BBH detections have been made using quasi-circular templates in their initial discovery. However, recent studies have found some of these systems to be compatible with high eccentricity in the LIGO band, $e_{10 \textrm{Hz}} > 0.1$, possibly pointing to a population of sources that are challenging to detect. Current low-latency search methods used with ground-based GW detector data are not well equipped to detect highly eccentric sources. Template-based, matched-filter searches require accurate eccentric waveform models that are computational expensive. Unmodeled burst searches are designed to detected localized excess power and are unable to identify multiple isolated bursts, as would originate from a single highly eccentric BBH. Therefore, we propose a signal-based prior that can be incorporated into an existing GW burst search to target highly eccentric BBHs. Our eccentric burst prior is based on the Newtonian burst model described by Loutrel & Yunes (2017). As a proof of concept, we test our method on simulated data and find that for intermediate SNR $\sim3-6$ signals using the eccentric burst prior more effectively localizes GW bursts when compared to a uniform prior.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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