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 . The search employs the Falcon analysis pipeline [V. Dergachev and M. A. Papa, Phys. Rev. Lett. 123, 101101 (2019)] on LIGO O2 public data. Our results improve by a factor greater than 5 over [B. P. Abbott et al. (LIGO Scientific and Virgo Collaborations), Phys. Rev. D 100, 024004 (2019)]. 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 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.
- Received 8 December 2020
- Accepted 18 February 2021
DOI:https://doi.org/10.1103/PhysRevD.103.063019
Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Open access publication funded by the Max Planck Society.
Published by the American Physical Society