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arXiv 2411.04498gr-qcastro-ph.CO
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搜寻旋近致密双星系统长暂态引力波的新方法

New approach to search for long transient gravitational waves from inspiraling compact binary systems

M. Andrés-Carcasona, O. J. Piccinni, M. Martínez, Ll. M. Mir

AI总结:

本文提出一种利用连续引力波搜索技术探测轻致密双星旋近长暂态信号的新方法,通过优化参数空间网格降低计算成本,灵敏度经LIGO数据验证,探测距离可达银河系中心。

摘要:

搜寻由轻致密双星旋近阶段产生的引力波,对于检验原初黑洞和/或其他奇异天体的存在具有重要前景。本文提出了一种新方法,利用通常用于搜寻连续准单色引力波的技术来探测此类信号。我们描述了所使用的信号模型,并提出了一种新策略,以最优方式构建所研究参数空间上的搜索网格,从而显著降低搜索计算成本。此外,我们估计了该流程的灵敏度,并通过在LIGO第三次观测运行的真实数据中进行软件注入来验证结果。结果表明,该方法非常适用于探测长暂态信号和标准连续引力波。根据网格构建步骤中使用的标准,该方法可以覆盖较宽的参数空间,但灵敏度略有降低且计算成本较低;或者专注于较窄的参数空间,以更高的计算成本获得更高的灵敏度。对于某些参数空间区域和给定的搜索配置,该方法的天体物理探测距离可达银河系中心(8千秒差距)。

英文摘要:

The search for gravitational waves generated by the inspiral phase of binaries of light compact objects holds significant promise in testing the existence of primordial black holes and/or other exotic objects. In this paper, we present a new method to detect such signals exploiting some techniques typically applied in searches for continuous quasi-monochromatic gravitational waves. We describe the signal model employed and present a new strategy to optimally construct the search grid over the parameter space investigated, significantly reducing the search computing cost. Additionally, we estimate the pipeline sensitivity corroborating the results with software injections in real data from the LIGO third observing run. The results show that the method is well suited to detect long-transient signals and standard continuous gravitational waves. According to the criteria used in the grid construction step, the method can be implemented to cover a wide parameter space with slightly reduced sensitivity and lower computational cost or to focus on a narrower parameter space with increased sensitivity at a higher computational expense. The method shows an astrophysical reach up to the Galactic Center (8kpc) for some regions of the parameter space and given search configurations.

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