Search for continuous gravitational wave emission from the Milky Way center in O3 LIGO--Virgo data

LIGO Scientific and Virgo Collaboration, Alberto Vecchio, Patricia Schmidt, Geraint Pratten, Riccardo Buscicchio, Chris Moore, Jiri Smetana, Kazuhiro Agatsuma, David Stops, Conor Mow-Lowry, Amit Ubhi, Leonid Prokhorov, Denis Martynov, Teng Zhang, Riccardo Maggiore

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We present a directed search for continuous gravitational wave (CW) signals emitted by spinning neutron stars located in the inner parsecs of the Galactic Center (GC). Compelling evidence for the presence of a numerous population of neutron stars has been reported in the literature, turning this region into a very interesting place to look for CWs. In this search, data from the full O3 LIGO--Virgo run in the detector frequency band [10,2000] Hz have been used. No significant detection was found and 95% confidence level upper limits on the signal strain amplitude were computed, over the full search band, with the deepest limit of about 7.6×10−26 at ≃142 Hz. These results are significantly more constraining than those reported in previous searches. We use these limits to put constraints on the fiducial neutron star ellipticity and r-mode amplitude. These limits can be also translated into constraints in the black hole mass -- boson mass plane for a hypothetical population of boson clouds around spinning black holes located in the GC.
Original languageEnglish
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Publication statusAccepted/In press - 29 Jun 2022

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Not yet published as of 08/08/2022


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