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.File | Dimensione | Formato | |
---|---|---|---|
Abbott-2019-All-sky-search-for-continuous-gravi.pdf
accesso aperto
Tipologia:
Versione Editoriale
Licenza:
DRM non definito
Dimensione
5.38 MB
Formato
Adobe PDF
|
5.38 MB | Adobe PDF | Visualizza/Apri |
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.