Loosely coherent search in LIGO O1 data for continuous gravitational waves from Terzan 5 and the Galactic Center

被引：20

作者：

Dergachev, Vladimir ^{[1
,2
]}

Papa, Maria Alessandra ^{[1
,2
,3
]}

Steltner, Benjamin ^{[1
,2
]}

Eggenstein, Heinz-Bernd ^{[1
,2
]}

机构：

[1] Albert Einstein Inst, Max Planck Inst Gravitat Phys, Callinstr 38, D-30167 Hannover, Germany

[2] Leibniz Univ Hannover, D-30167 Hannover, Germany

[3] Univ Wisconsin, 3135 N Maryland Ave, Milwaukee, WI 53211 USA

来源：

PHYSICAL REVIEW D | 2019年 / 99卷 / 08期

基金：

美国国家科学基金会; 澳大利亚研究理事会;

关键词：

D O I：

10.1103/PhysRevD.99.084048

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We report results of a search for continuous gravitational waves from a region covering the globular cluster Terzan 5 and the Galactic Center. Continuous gravitational waves are expected from fast-spinning, slightly nonaxisymmetric isolated neutron stars as well as more exotic objects. The regions that we target are believed to be unusually abundant in neutron stars. We use a new loosely coherent search method that allows one to reach unprecedented levels of sensitivity for this type of search. The search covers the frequency band 475-1500 Hz and frequency time derivatives in the range of [-3.0, +0.1] x 10(-8) Hz/s, which is a parameter range not explored before with the depth reached by this search. As to be expected with only a few months of data from the same observing run, it is very difficult to make a confident detection of a continuous signal over such a large parameter space. A list of parameter space points that passed all the thresholds of this search is provided. We follow up the most significant outlier on the newly released O2 data and cannot confirm it. We provide upper limits on the gravitational wave strength of signals as a function of signal frequency.

引用

页数：15

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