All-sky search for periodic gravitational waves in the O1 LIGO data
All-sky search for periodic gravitational waves in the O1 LIGO data
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DOI：
10.1103/physrevd.96.062002
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发表时间：
2017-07
影响因子：
5
通讯作者：
B. Abbott;R. Abbott;R. Adhikari;A. Ananyeva;S. Anderson;S. Appert;K. Arai;M. Araya;J. Barayo
中科院分区：
文献类型：
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作者：
B. Abbott;R. Abbott;R. Adhikari;A. Ananyeva;S. Anderson;S. Appert;K. Arai;M. Araya;J. Barayo
我们报告了对频率为20-475 Hz、频率时间导数在[−1.0，+0.1]×10−8 Hz/s范围内的周期引力波的全天搜索。这样的信号可能是由我们银河系中一颗旋转的、稍微非轴对称的孤立中子星星产生的。这次搜索使用了Advanced LIGO第一次观测运行O 1的数据。没有观察到周期性的引力波信号，并且对它们的强度设置了上限。最坏情况（线性极化）应变振幅h 0的最低上限在170 Hz附近为104 ×10−25。对于圆偏振源（最有利的方向），获得的最小上限为1.5×10−25。这些上限指的是所有天空位置和频率导数值的整个范围。对于天空位置和恒星方向的总体平均系综，得到的应变振幅的最低上限是102.5 ×10−25。
We report on an all-sky search for periodic gravitational waves in the frequency band 20–475 Hz and with a frequency time derivative in the range of [−1.0,+0.1]×10−8 Hz/s. Such a signal could be produced by a nearby spinning and slightly nonaxisymmetric isolated neutron star in our galaxy. This search uses the data from Advanced LIGO’s first observational run, O1. No periodic gravitational wave signals were observed, and upper limits were placed on their strengths. The lowest upper limits on worst-case (linearly polarized) strain amplitude h0 are ∼4×10−25 near 170 Hz. For a circularly polarized source (most favorable orientation), the smallest upper limits obtained are ∼1.5×10−25. These upper limits refer to all sky locations and the entire range of frequency derivative values. For a population-averaged ensemble of sky locations and stellar orientations, the lowest upper limits obtained for the strain amplitude are ∼2.5×10−25.