Results from high-frequency all-sky search for continuous gravitational waves from small-ellipticity sources
Abstract
We present the results of an all-sky search for continuous gravitational wave signals with frequencies in the 1700-2000 Hz range from neutron stars with ellipticity of ≈10-8 . The search employs the Falcon analysis pipeline [V. Dergachev and M. A. Papa, Phys. Rev. Lett. 123, 101101 (2019), 10.1103/PhysRevLett.123.101101] on LIGO O2 public data. Our results improve by a factor greater than 5 over [B. P. Abbott et al. (<collab>LIGO Scientific and Virgo Collaborations</collab>), Phys. Rev. D 100, 024004 (2019), 10.1103/PhysRevD.100.024004]. This is a huge leap forward: it takes an entirely new generation of gravitational wave detectors to achieve a 10-fold sensitivity increase over the previous generation [D. Reitze et al., Bull. Am. Astron. Soc. 51, 035 (2019)]. Within the probed frequency range and aside from the detected outliers, we can exclude neutron stars with ellipticity of 10-8 within 65 pc of Earth. We set upper limits on the gravitational wave amplitude that holds even for worst-case signal parameters. New outliers are found, some of which we are unable to associate with any instrumental cause. If any were associated with a rotating neutron star, this would likely be the fastest neutron star today.
- Publication:
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Physical Review D
- Pub Date:
- March 2021
- DOI:
- 10.1103/PhysRevD.103.063019
- arXiv:
- arXiv:2012.04232
- Bibcode:
- 2021PhRvD.103f3019D
- Keywords:
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- General Relativity and Quantum Cosmology;
- Astrophysics - High Energy Astrophysical Phenomena
- E-Print:
- Phys. Rev. D 103, 063019 (2021)