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Free keywords:
General Relativity and Quantum Cosmology, gr-qc, Astrophysics, High Energy Astrophysical Phenomena, astro-ph.HE
Abstract:
Broadband all-sky searches for continuous gravitational waves (CW) from
isolated neutron stars typically yield a number of significant candidates that
are discarded through hierarchical semi-coherent and coherent follow-up
searches. However, these searches target purely isolated sources and do not
take into account possible phase modulations to the signals due to companion
objects in binary orbits. If the source object is in a binary orbit, the
signal-to-noise ratio (SNR) of a signal will diminish due to the mismatch
between the signal waveform and the template waveform used in the search. In
this paper, we investigate the sensitivity of CW searches to signals from
sources in binary systems over an exhaustive range of binary orbits. We use
Monte-Carlo simulations to constrain the ranges of binary orbital parameters
that leave a CW signal from a source in a binary orbit visible in a search for
signals from an isolated source (isolated searches), and consequently tighten
the parameter space explorable with dedicated searches for signals from sources
in binary systems (binary searches).
