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arXiv 2012.05752gr-qcastro-ph.IM
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用于比较连续引力波信号的时频跟踪距离

Time-frequency track distance for comparing continuous gravitational wave signals

Rodrigo Tenorio, David Keitel, Alicia M. Sintes

摘要:

对来自未知源的连续引力波的探测试图通过识别数据中的多普勒调制特征来探测持久的引力辐射。半相干方法允许广泛的参数空间调查,确定感兴趣的区域,使用更敏感的(和计算昂贵的)工具。因此,需要正确理解所研究的参数空间结构,因为如果不这样做,可能会显著影响所述策略的有效性。我们介绍了一种新的措施,适合于半相干连续波搜索的参数空间中的距离。这种新的方法,比较时间-频率轨迹的基础上,可以应用于任何种类的准单色连续波信号,并适应自己的底层结构的参数空间的研究。在第一个应用程序的后处理阶段的全天搜索连续波从中子星在二进制系统中,我们证明了搜索灵敏度的提高,完全取代以前的特设距离措施的候选人聚类过程中的新建议。

英文摘要:

Searches for continuous gravitational waves from unknown sources attempt to detect long-lasting gravitational radiation by identifying Doppler-modulated signatures in the data. Semicoherent methods allow for wide parameter space surveys, identifying interesting regions to be followed up using more sensitive (and computationally expensive) tools. Thus, it is required to properly understand the parameter space structure under study, as failing to do so could significantly affect the effectiveness of said strategies. We introduce a new measure for distances in parameter space suited for semicoherent continuous wave searches. This novel approach, based on comparing time-frequency tracks, can be applied to any kind of quasi-monochromatic continuous wave signals and adapts itself to the underlying structure of the parameter space under study. In a first application to the post-processing stage of an all-sky search for continuous waves from neutron stars in binary systems, we demonstrate a search sensitivity improvement by solely replacing previous ad hoc distance measures in the candidate clustering procedure by the new proposal.

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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