Search for gravitational waves from Scorpius X-1 in the first Advanced LIGO observing run with a hidden Markov modelстатья
Статья опубликована в высокорейтинговом журнале
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Дата последнего поиска статьи во внешних источниках: 8 августа 2017 г.
Аннотация:Results are presented from a semicoherent search for continuous gravitational waves from the brightest low-mass X-ray binary, Scorpius X-1, using data collected during the first Advanced LIGO observing run. The search combines a frequency domain matched filter (Bessel-weighted
F
-statistic) with a hidden Markov model to track wandering of the neutron star spin frequency. No evidence of gravitational waves is found in the frequency range 60–650 Hz. Frequentist 95% confidence strain upper limits,
h
95
%
0
=
4.0
×
1
0
−
25
,
8.3
×
1
0
−
25
, and
3.0
×
1
0
−
25
for electromagnetically restricted source orientation, unknown polarization, and circular polarization, respectively, are reported at 106 Hz. They are
≤
10
times higher than the theoretical torque-balance limit at 106 Hz.