Searches for continuous gravitational waves from young supernova remnants in the early third observing run of Advanced LIGO and Virgo
Searches for continuous gravitational waves from young supernova remnants in the early third observing run of Advanced LIGO and Virgo
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DOI：
10.3847/1538-4357/ac17ea
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发表时间：
2021-05
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我们目前的结果三个宽带定向搜索连续引力波从15个年轻的超新星遗迹在第三先进的LIGO和处女座观测运行的上半年。我们使用三个搜索管道，具有不同的信号模型和识别噪声伪影的方法。如果没有这些来源的星历表，则在10至2 kHz的频率带上进行搜索。我们没有发现来自这些源的连续引力辐射的证据。我们设置上限的内在信号应变在95%的置信水平，在样本子带，估计在全波段的灵敏度，并得出相应的约束基准中子星星椭圆率和r-模式振幅。超新星遗迹G39.2-0.3和G65.7+1.2在200 Hz附近的信号应变的最佳95%置信度约束分别为7.7 × 10−26和7.8 × 10−26。对于最近的超新星遗迹G266.2-1.2/Vela Jr，椭圆率和r模振幅的最严格限制分别达到1010 −7和1010 −5，频率超过10400 Hz。
We present results of three wide-band directed searches for continuous gravitational waves from 15 young supernova remnants in the first half of the third Advanced LIGO and Virgo observing run. We use three search pipelines with distinct signal models and methods of identifying noise artifacts. Without ephemerides of these sources, the searches are conducted over a fRequency band spanning from 10 to 2 kHz. We find no evidence of continuous gravitational radiation from these sources. We set upper limits on the intrinsic signal strain at 95% confidence level in sample subbands, estimate the sensitivity in the full band, and derive the corresponding constraints on the fiducial neutron star ellipticity and r-mode amplitude. The best 95% confidence constraints placed on the signal strain are 7.7 × 10−26 and 7.8 × 10−26 near 200 Hz for the supernova remnants G39.2–0.3 and G65.7+1.2, respectively. The most stringent constraints on the ellipticity and r-mode amplitude reach ≲10−7 and ≲ 10−5, respectively, at frequencies above ∼400 Hz for the closest supernova remnant G266.2–1.2/Vela Jr.