• Medientyp: Sonstige Veröffentlichung; E-Artikel
  • Titel: Search for continuous gravitational waves from neutron stars in globular cluster NGC 6544
  • Beteiligte: Abbott, B.P. [VerfasserIn]; Abbott, R. [VerfasserIn]; Abbott, T.D. [VerfasserIn]; Abernathy, M.R. [VerfasserIn]; Acernese, F. [VerfasserIn]; Ackley, K. [VerfasserIn]; Adams, C. [VerfasserIn]; Adams, T. [VerfasserIn]; Addesso, P. [VerfasserIn]; Adhikari, R.X. [VerfasserIn]; Adya, V.B. [VerfasserIn]; Affeldt, C. [VerfasserIn]; Agathos, M. [VerfasserIn]; Agatsuma, K. [VerfasserIn]; Aggarwal, N. [VerfasserIn]; Aguiar, O.D. [VerfasserIn]; Aiello, L. [VerfasserIn]; Ain, A. [VerfasserIn]; Allen, B. [VerfasserIn]; Allocca, A. [VerfasserIn]; Altin, P.A. [VerfasserIn]; Anderson, S.B. [VerfasserIn]; Anderson, W.G. [VerfasserIn]; Arai, K. [VerfasserIn]; [...]
  • Erschienen: College Park, MD : American Physical Society, 2017
  • Erschienen in: Physical Review D 95 (2017), Nr. 8 ; Physical Review D
  • Ausgabe: published Version
  • Sprache: Englisch
  • DOI: https://doi.org/10.15488/12009; https://doi.org/10.1103/PhysRevD.95.082005
  • ISSN: 2470-0010
  • Schlagwörter: pulsar ; emission ; spin-down limit ; ligo
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  • Beschreibung: 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. © 2017 American Physical Society.
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