Searches for continuous gravitational waves from nine young supernova remnants

Adams, T., Dooley, Katherine ORCID: https://orcid.org/0000-0002-1636-0233, Edwards, M., Fairhurst, Stephen ORCID: https://orcid.org/0000-0001-8480-1961, Grote, Hartmut ORCID: https://orcid.org/0000-0002-0797-3943, Hannam, Mark ORCID: https://orcid.org/0000-0001-5571-325X, Hopkins, Paul ORCID: https://orcid.org/0000-0003-1535-3848, Ohme, Frank, Pannarale Greco, Francesco ORCID: https://orcid.org/0000-0002-7537-3210, Predoi, Valeriu ORCID: https://orcid.org/0000-0002-9729-6578, Pürrer, M., Sathyaprakash, Bangalore ORCID: https://orcid.org/0000-0003-3845-7586, Schmidt, P., Schutz, Bernard Frederick ORCID: https://orcid.org/0000-0001-9487-6983, Sutton, Patrick J. ORCID: https://orcid.org/0000-0003-1614-3922 and Williamson, Andrew R. ORCID: https://orcid.org/0000-0002-7627-8688 2015. Searches for continuous gravitational waves from nine young supernova remnants. The Astrophysical Journal 813 (1) , 39. 10.1088/0004-637X/813/1/39

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Abstract

We describe directed searches for continuous gravitational waves (GWs) in data from the sixth Laser Interferometer Gravitational-wave Observatory (LIGO) science data run. The targets were nine young supernova remnants not associated with pulsars; eight of the remnants are associated with non-pulsing suspected neutron stars. One target's parameters are uncertain enough to warrant two searches, for a total of 10. Each search covered a broad band of frequencies and first and second frequency derivatives for a fixed sky direction. The searches coherently integrated data from the two LIGO interferometers over time spans from 5.3–25.3 days using the matched-filtering ${\mathcal{F}}$-statistic. We found no evidence of GW signals. We set 95% confidence upper limits as strong (low) as 4 × 10−25 on intrinsic strain, 2 × 10−7 on fiducial ellipticity, and 4 × 10−5 on r-mode amplitude. These beat the indirect limits from energy conservation and are within the range of theoretical predictions for neutron-star ellipticities and r-mode amplitudes.

Item Type:	Article
Date Type:	Published Online
Status:	Published
Schools:	Physics and Astronomy
Subjects:	Q Science > QC Physics
Publisher:	IOP Science
Date of Acceptance:	18 September 2015
Last Modified:	13 Jan 2023 03:31
URI:	https://orca.cardiff.ac.uk/id/eprint/80602

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