• Open Access

Results from high-frequency all-sky search for continuous gravitational waves from small-ellipticity sources

Vladimir Dergachev and Maria Alessandra Papa
Phys. Rev. D 103, 063019 – Published 16 March 2021
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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 108. 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 108 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.

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  • 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

Physics Subject Headings (PhySH)

Gravitation, Cosmology & Astrophysics

Authors & Affiliations

Vladimir Dergachev1,2,* and Maria Alessandra Papa1,2,3,†

  • 1Max Planck Institute for Gravitational Physics (Albert Einstein Institute), Callinstrasse 38, 30167 Hannover, Germany
  • 2Leibniz Universität Hannover, D-30167 Hannover, Germany
  • 3University of Wisconsin Milwaukee, 3135 N Maryland Ave, Milwaukee, Wisconsin 53211, USA

  • *vladimir.dergachev@aei.mpg.de
  • maria.alessandra.papa@aei.mpg.de

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Vol. 103, Iss. 6 — 15 March 2021

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