arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2007.08732gr-qcastro-ph.IM
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用隐马尔可夫模型在第二次高级LIGO观测运行中搜索北落师门b的连续引力波

Search for continuous gravitational waves from Fomalhaut b in the second Advanced LIGO observing run with a hidden Markov model

Dana Jones, Ling Sun

摘要:

结果是从一个连续的引力波从附近的中子星候选人,北落师门b的半相干搜索,使用在第二次观测运行的高级LIGO收集的数据。搜索是基于一个隐马尔可夫模型计划,能够跟踪信号频率的演变,从恒星的长期自旋下降和随机定时噪声的同时。该方案与频域匹配滤波器($\mathcal{F}$ -统计)相结合,在五天的时间拉伸相干计算。搜索100-1000 Hz的频带。在通过一系列否决之后,一个略高于1%虚警概率阈值的候选人仍需进一步审查。在90%置信水平下,给出了全频带内的应变上限。

英文摘要:

Results are presented from a semicoherent search for continuous gravitational waves from a nearby neutron star candidate, Fomalhaut b, using data collected in the second observing run of Advanced LIGO. The search is based on a hidden Markov model scheme, capable of tracking signal frequency evolution from the star's secular spin down and stochastic timing noise simultaneously. The scheme is combined with a frequency domain matched filter ($\mathcal{F}$-statistic), calculated coherently over five-day time stretches. The frequency band 100-1000 Hz is searched. After passing the above-threshold candidates through a hierarchy of vetoes, one candidate slightly above the 1% false alarm probability threshold remains for further scrutiny. No strong evidence of continuous waves is found. We present the strain upper limits in the full frequency band searched at 90% confidence level.

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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