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arXiv 1608.07589gr-qcastro-ph.HEastro-ph.IM
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对仙后座A连续引力波的Einstein@home搜索

An Einstein@home search for continuous gravitational waves from Cassiopeia A

Sylvia J. Zhu, Maria Alessandra Papa, Heinz-Bernd Eggenstein, Reinhard Prix, Karl Wette, Bruce Allen, Oliver Bock, David Keitel, Badri Krishnan, Bernd Machensch… 展开作者

Sylvia J. Zhu, Maria Alessandra Papa, Heinz-Bernd Eggenstein, Reinhard Prix, Karl Wette, Bruce Allen, Oliver Bock, David Keitel, Badri Krishnan, Bernd Machenschalk, Miroslav Shaltev, Xavier Siemens

摘要:

我们报告的结果,定向搜索连续的引力波发射在一个广泛的频率范围(50和1000赫兹之间)从中央紧凑的超新星遗迹仙后座A(Cas A)的对象。这些数据来自LIGO的第六次科学运行,搜索是在志愿者分布式计算网络Einstein@Home上进行的。我们没有发现重要的信号候选者,并设置了迄今为止对Cas A引力波发射的最具约束力的上限,这在整个搜索范围内都超过了间接的年龄上限。在170 Hz左右(最敏感的频率范围),我们对$\sim\!\!~2.9\times 10^{-25}$的引力波振幅$h_0$设置了90%的置信上限,大约是之前对Cas A搜索的上限的两倍。上限也可以表示为对Cas A的椭圆率的限制;通过一些合理的假设,我们表明,在引力波频率大于300 Hz时,我们可以排除$\gtrsim\!\!~10^{-5}$的椭圆率。

英文摘要:

We report the results of a directed search for continuous gravitational-wave emission in a broad frequency range (between 50 and 1000 Hz) from the central compact object of the supernova remnant Cassiopeia A (Cas A). The data comes from the sixth science run of LIGO and the search is performed on the volunteer distributed computing network Einstein@Home. We find no significant signal candidate, and set the most constraining upper limits to date on the gravitational-wave emission from Cas A, which beat the indirect age-based upper limit across the entire search range. At around 170 Hz (the most sensitive frequency range), we set 90% confidence upper limits on the gravitational wave amplitude $h_0$ of $\sim\!\!~2.9\times 10^{-25}$, roughly twice as constraining as the upper limits from previous searches on Cas A. The upper limits can also be expressed as constraints on the ellipticity of Cas A; with a few reasonable assumptions, we show that at gravitational-wave frequencies greater than 300~Hz, we can exclude an ellipticity of $\gtrsim\!\!~10^{-5}$.

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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