Search for continuous gravitational waves from neutron stars in globular cluster NGC 6544

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dc.contributor.authorAbbott, B. P.
dc.contributor.authorDavies, G. S.
dc.contributor.authorLIGO Scientific Collaboration and Virgo Collaboration
dc.date.accessioned2017-07-18T14:26:17Z
dc.date.available2017-07-18T14:26:17Z
dc.date.issued2017-04
dc.description.abstractWe 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.en_UK
dc.identifier.citationAbbott, BP., et al., (LIGO Scientific Collaboration and Virgo Collaboration). Search for continuous gravitational waves from neutron stars in globular cluster NGC 6544. Physical Review D, 95(8) 082005 (2017)en_UK
dc.identifier.urihttp://dspace.lib.cranfield.ac.uk/handle/1826/12207
dc.identifier.urihttps://doi.org/10.1103/physrevd.95.082005
dc.language.isoenen_UK
dc.publisherAmerican Physical Societyen_UK
dc.rights© 2017 American Physical Society. This is the publisher Version of Record Manuscript. Please refer to any applicable publisher terms of use.
dc.titleSearch for continuous gravitational waves from neutron stars in globular cluster NGC 6544en_UK
dc.typeArticleen_UK

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