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arXiv 0906.0023gr-qc
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利用大尺度关联探测连续引力波

Exploiting Large-Scale Correlations to Detect Continuous Gravitational Waves

Holger J. Pletsch, Bruce Allen

摘要:

完全相干搜索(在参数空间和长达一年的观测时间的实际范围内)对未知的连续引力波源的计算是禁止的。成本较低的分层搜索将数据划分为较短的段进行相干分析,然后将来自不同段的检测统计数据进行非相干组合。本文提出的新方法解决了如何最好地进行非相干合成的长期问题。最佳解决方案利用大规模的参数空间相关性的相干检测统计。模拟数据的应用程序显示显着的灵敏度改善与以前可用的(特设)方法相比,增加了空间体积探测超过2个数量级,以较低的计算成本。

英文摘要:

Fully coherent searches (over realistic ranges of parameter space and year-long observation times) for unknown sources of continuous gravitational waves are computationally prohibitive. Less expensive hierarchical searches divide the data into shorter segments which are analyzed coherently, then detection statistics from different segments are combined incoherently. The novel method presented here solves the long-standing problem of how best to do the incoherent combination. The optimal solution exploits large-scale parameter-space correlations in the coherent detection statistic. Application to simulated data shows dramatic sensitivity improvements compared with previously available (ad hoc) methods, increasing the spatial volume probed by more than 2 orders of magnitude at lower computational cost.

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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