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arXiv 1606.00660gr-qcastro-ph.IM
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探测来自未知中子星的引力波的方法比较

A comparison of methods for the detection of gravitational waves from unknown neutron stars

Sinead Walsh, Matthew Pitkin, Miquel Oliver, Sabrina D'Antonio, Vladimir Dergachev, Andrzej Krolak, Pia Astone, Michal Bejger, Matteo Di Giovanni, Orest Dorosh,… 展开作者

Sinead Walsh, Matthew Pitkin, Miquel Oliver, Sabrina D'Antonio, Vladimir Dergachev, Andrzej Krolak, Pia Astone, Michal Bejger, Matteo Di Giovanni, Orest Dorosh, Sergio Frasca, Paola Leaci, Simone Mastrogiovanni, Andrew Miller, Cristiano Palomba, Maria Alessandra Papa, Ornella J. Piccinni, Keith Riles, Orion Sauter, Alicia M. Sintes

摘要:

对于LIGO和Virgo干涉仪来说,快速旋转的中子星是有希望的连续引力波辐射源。我们银河系中的大多数中子星还没有被电磁观测所识别。对孤立中子星的全天搜索提供了探测来自这些不明来源的引力波的可能性。这些盲全天空搜索的参数空间也覆盖了大范围的频率和频率导数,这是一个重大的计算挑战。已经设计了不同的方法来在可接受的计算限制内执行这些搜索。在这里,我们描述的第一个基准在一个项目中比较搜索方法目前可用于检测未知的孤立的中子星。我们采用模拟数据的挑战,以比较每种搜索方法的能力,以恢复信号模拟假设一个标准的信号模型。我们发现短持续时间的搜索方法之间的性能相似,而长持续时间的搜索方法达到了两个更高的灵敏度的一个因素。我们发现,在搜索参数空间中的二阶导数频率的情况下,不会降低搜索灵敏度的信号与物理上合理的二阶导数频率。我们还报告了每种搜索方法的参数估计精度,以及频率,频率导数和检测器噪声存在下的灵敏度的稳定性。

英文摘要:

Rapidly rotating neutron stars are promising sources of continuous gravitational wave radiation for the LIGO and Virgo interferometers. The majority of neutron stars in our galaxy have not been identified with electromagnetic observations. All-sky searches for isolated neutron stars offer the potential to detect gravitational waves from these unidentified sources. The parameter space of these blind all-sky searches, which also cover a large range of frequencies and frequency derivatives, presents a significant computational challenge. Different methods have been designed to perform these searches within acceptable computational limits. Here we describe the first benchmark in a project to compare the search methods currently available for the detection of unknown isolated neutron stars. We employ a mock data challenge to compare the ability of each search method to recover signals simulated assuming a standard signal model. We find similar performance among the short duration search methods, while the long duration search method achieves up to a factor of two higher sensitivity. We find the absence of second derivative frequency in the search parameter space does not degrade search sensivity for signals with physically plausible second derivative frequencies. We also report on the parameter estimation accuracy of each search method, and the stability of the sensitivity in frequency, frequency derivative and in the presence of detector noise.

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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