First Low-Frequency Einstein@Home All-Sky Search for Continuous Gravitational Waves in Advanced LIGO Data
First Low-Frequency Einstein@Home All-Sky Search for Continuous Gravitational Waves in Advanced LIGO Data
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DOI：
10.1103/physrevd.96.122004
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发表时间：
2017-07
影响因子：
5
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我们报告的结果，从孤立的中子星的数据从第一个先进的LIGO观测运行的周期性引力波的深全天搜索。这项研究调查了Advanced LIGO数据的低频范围，在20到100 Hz之间，其中大部分在最初的LIGO中没有被探索。这项搜索是由Einstein@Home项目的志愿者提供的计算能力实现的。我们没有发现明显的信号候选者，并对来自目标群体的引力波信号的振幅设定了迄今为止最严格的上限，对应于48.7 [1/Hz]的灵敏度深度。在最佳应变灵敏度的频率（接近100 Hz）下，我们将90%置信度上限设置为1.8×10^（−25）。在我们的频率范围的低端，20 Hz，我们达到3.9×10^（−24）的上限。在55 Hz时，我们可以排除在地球100 pc范围内椭圆度大于10^（−5）的源，主惯性矩的基准值为10^（38）kg m^2。
We report results of a deep all-sky search for periodic gravitational waves from isolated neutron stars in data from the first Advanced LIGO observing run. This search investigates the low frequency range of Advanced LIGO data, between 20 and 100 Hz, much of which was not explored in initial LIGO. The search was made possible by the computing power provided by the volunteers of the Einstein@Home project. We find no significant signal candidate and set the most stringent upper limits to date on the amplitude of gravitational wave signals from the target population, corresponding to a sensitivity depth of 48.7 [1/√Hz]. At the frequency of best strain sensitivity, near 100 Hz, we set 90% confidence upper limits of 1.8×10^(−25). At the low end of our frequency range, 20 Hz, we achieve upper limits of 3.9×10^(−24). At 55 Hz we can exclude sources with ellipticities greater than 10^(−5) within 100 pc of Earth with fiducial value of the principal moment of inertia of 10^(38) kg m^2.