Search for continuous gravitational waves from neutron stars in globular cluster NGC 6544
, ed. (2017) Search for continuous gravitational waves from neutron stars in globular cluster NGC 6544. Physical Review D, 95 (8). 082005. ISSN 1550-2368
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Text (Abbott-etal-PRD-2017-Search-for-continuous-gravitational-waves-from-neutron-stars-in-globular-cluster-NGC-6544)
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Abstract
We describe a directed search for continuous gravitational waves in data from the sixth initial LIGO science run. The target was the nearby globular cluster NGC 6544 at a distance of ≈2.7 kpc. The search covered a broad band of frequencies along with first and second frequency derivatives for a fixed sky position. The search coherently integrated data from the two LIGO interferometers over a time span of 9.2 days using the matched-filtering F-statistic. We found no gravitational-wave signals and set 95% confidence upper limits as stringent as 6.0×10−25 on intrinsic strain and 8.5×10−6 on fiducial ellipticity. These values beat the indirect limits from energy conservation for stars with characteristic spin-down ages older than 300 years and are within the range of theoretical predictions for possible neutron-star ellipticities. An important feature of this search was use of a barycentric resampling algorithm which substantially reduced computational cost; this method is used extensively in searches of Advanced LIGO and Virgo detector data.
Creators(s): | LIGO Scientific Collaboration, Virgo Collaboration; | Item type: | Article |
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ID code: | 62453 |
Keywords: | LIGO, gravitational waves, NGC 6544, gravitational wave detectors, neutron stars, pulsars, Physics, Astronomy and Astrophysics |
Subjects: | Science > Physics |
Department: | Faculty of Science > Physics |
Depositing user: | Pure Administrator |
Date deposited: | 28 Nov 2017 12:18 |
Last modified: | 01 Jan 2021 12:23 |
Related URLs: | |
URI: | https://strathprints.strath.ac.uk/id/eprint/62453 |
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