Search for continuous gravitational waves from unknown neutron stars in binary systems with long orbital periods in O3 data
arXiv:2409.16196 · doi:10.3847/1538-4357/adcc2b
Abstract
Gravitational waves emitted by asymmetric rotating neutron stars are the primary targets of continuous gravitational-wave searches. Neutron stars in binary systems are particularly interesting due to the potential for non-axisymmetric deformations induced by a companion star. However, all-sky searches for unknown neutron stars in binary systems are very computationally expensive and this limits their sensitivity and/or breadth. In this paper we present results of a search for signals with gravitational-wave frequencies between and ~Hz, from systems with orbital periods between and days and projected semi-major axes between and ~light-seconds. This parameter-space region has never been directly searched before. We do not detect any signal, and our results exclude gravitational-wave amplitudes above at ~Hz with confidence. Our improved search pipeline is more sensitive than any previous all-sky binary search by about .
11 pages
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