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공공누리This item is licensed Korea Open Government License

Title
All-sky search for periodic gravitational waves in the full S5 LIGO data
Author(s)
J.Abadieetal강궁원장행진
Publication Year
2012-01-05
Abstract
Wereportonanall-skysearchforperiodicgravitationalwavesinthefrequencyband50-800Hzandwiththefrequencytimederivativeintherangeof0through-6e-9Hz/s.Suchasignalcouldbeproducedbyanearbyspinningandslightlynon-axisymmetricisolatedneutronstarinourgalaxy.Afterrecentimprovementsinthesearchprogramthatyieldeda10xincreaseincomputationalefficiency,wehavesearchedintwoyearsofdatacollectedduringLIGOsfifthsciencerunandhaveobtainedthemostsensitiveall-skyupperlimitsongravitationalwavestraintodate.Near150Hzourupperlimitonworst-caselinearlypolarizedstrainamplitudeh0is1e-24,whileatthehighendofourfrequencyrangeweachieveaworst-caseupperlimitof3.8e-24forallpolarizationsandskylocations.Theseresultsconstituteafactoroftwoimprovementuponpreviouslypublisheddata.AnewdetectionpipelineutilizingaLooselyCoherentalgorithmwasabletofollowupweakeroutliers,increasingthevolumeofspacewheresignalscanbedetectedbyafactorof10,buthasnotrevealedanygravitationalwavesignals.Thepipelinehasbeentestedforrobustnesswithrespecttodeviationsfromthemodelofanisolatedneutronstar,suchascausedbyalow-massorlong-periodbinarycompanion.
Keyword
Gravitationalwave; LIGO; Dataanalysis
Journal Title
Physicalreview.D,Particles,fields,gravitation,andcosmology
Citation Volume
85
ISSN
1550-7998
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Appears in Collections:
7. KISTI 연구성과 > 학술지 발표논문
URI
https://repository.kisti.re.kr/handle/10580/14054
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