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https://hdl.handle.net/2440/106232
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Type: | Journal article |
Title: | Search for continuous gravitational waves from neutron stars in globular cluster NGC 6544 |
Author: | Abbott, B. Abbott, R. Abbott, T. Abernathy, M. Acernese, F. Ackley, K. Adams, C. Adams, T. Addesso, P. Adhikari, R. Adya, V. Affeldt, C. Agathos, M. Agatsuma, K. Aggarwal, N. Aguiar, O. Aiello, L. Ain, A. Allen, B. Allocca, A. et al. |
Citation: | Physical Review D, 2017; 95(8):082005-1-082005-15 |
Publisher: | American Physical Society |
Issue Date: | 2017 |
ISSN: | 2470-0010 2470-0029 |
Statement of Responsibility: | B. P. Abbott … M. R. Abernathy … Won Kim … Jesper Munch … David J Ottaway … Peter J Veitch … et al. (LIGO Scientific Collaboration and Virgo Collaboration) |
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. |
Rights: | © 2017 American Physical Society |
DOI: | 10.1103/PhysRevD.95.082005 |
Published version: | http://dx.doi.org/10.1103/physrevd.95.082005 |
Appears in Collections: | Aurora harvest 3 Physics publications |
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