We present results of an all-sky search for continuous gravitational waves (CWs), which can be produced by fast-spinning neutron stars with an asymmetry around their rotation axis, using data from the second observing run of the Advanced LIGO detectors. We employ three different semi-coherent methods (FrequencyHough, SkyHough, and Time-Domain F-statistic) to search in a gravitational-wave frequency band from 20 to 1922 Hz and a first frequency derivative from −1×10−8 to 2×10−9 Hz/s. None of these searches has found clear evidence for a CW signal, so we present upper limits on the gravitational-wave strain amplitude h0 (the lowest upper limit on h0 is 1.7×10−25 in the 123-124 Hz region) and discuss the astrophysical implications of this result. This is the most sensitive search ever performed over the broad range of parameters explored in this study.

All-sky search for continuous gravitational waves from isolated neutron stars using Advanced LIGO O2 data

Marchesoni, F;Travasso, F;
2019-01-01

Abstract

We present results of an all-sky search for continuous gravitational waves (CWs), which can be produced by fast-spinning neutron stars with an asymmetry around their rotation axis, using data from the second observing run of the Advanced LIGO detectors. We employ three different semi-coherent methods (FrequencyHough, SkyHough, and Time-Domain F-statistic) to search in a gravitational-wave frequency band from 20 to 1922 Hz and a first frequency derivative from −1×10−8 to 2×10−9 Hz/s. None of these searches has found clear evidence for a CW signal, so we present upper limits on the gravitational-wave strain amplitude h0 (the lowest upper limit on h0 is 1.7×10−25 in the 123-124 Hz region) and discuss the astrophysical implications of this result. This is the most sensitive search ever performed over the broad range of parameters explored in this study.
2019
262
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11581/447866
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