Search of the Orion spur for continuous gravitational waves using a loosely coherent algorithm on data from LIGO interferometers
Search of the Orion spur for continuous gravitational waves using a loosely coherent algorithm on data from LIGO interferometers
复制标题
使用松散相干算法对来自 LIGO 干涉仪的数据搜索猎户座支线的连续引力波
DOI：
10.1103/physrevd.93.042006
复制
发表时间：
2016
影响因子：
5
通讯作者：
Aasi J
中科院分区：
文献类型：
--
作者：
Aasi J
我们报告的宽带搜索周期性引力波的结果，从孤立的中子星在猎户座支线对我们的银河系的内部和外部地区。由于引力波与物质的相互作用非常微弱，因此搜索不会受到尘埃和恒星聚集的阻碍。一个搜索盘（A）直径为6.87°，中心为，另一个（B）直径为7.45°，中心为。我们探索了50-1500 Hz的频率范围和0到的频率导数。一个多阶段的，松散coherentsearch程序允许探测比以前更深入地在这两个地区，同时增加每一个阶段的相干长度。严格的后续参数已经筛选出最初的符合性，只有70个候选人，需要人工检查。这70个候选者中没有一个被证明与孤立的引力波发射器一致，95%的置信水平上限被置于连续波应变振幅上。在接近169 Hz时，我们实现了最低的95% C.L.最坏情况下的线性极化应变振幅的上限为，而在我们的频率范围的高端，我们实现了所有极化和天空位置的最坏情况下的上限为。
We report results of a wideband search for periodic gravitational waves from isolated neutron stars within the Orion spur towards both the inner and outer regions of our Galaxy. As gravitational waves interact very weakly with matter, the search is unimpeded by dust and concentrations of stars. One search disk (A) is 6.87° in diameter and centered on, and the other (B) is 7.45° in diameter and centered on. We explored the frequency range of 50–1500 Hz and frequency derivative from 0 to. A multistage,loosely coherentsearch program allowed probing more deeply than before in these two regions, while increasing coherence length with every stage. Rigorous follow-up parameters have winnowed the initial coincidence set to only 70 candidates, to be examined manually. None of those 70 candidates proved to be consistent with an isolated gravitational-wave emitter, and 95% confidence level upper limits were placed on continuous-wave strain amplitudes. Near 169 Hz we achieve our lowest 95% C.L. upper limit on the worst-case linearly polarized strain amplitudeof, while at the high end of our frequency range we achieve a worst-case upper limit offor all polarizations and sky locations.