Speaker
Summary
Deformed neutron stars are a prime candidate for the emittance of
continuous gravitational waves. Since the signals are weak, long
integration times are needed. However, due to the Doppler shifts and
amplitude variations introduced by the detector movement, the coherence
time is limited already for solitary neutron stars. Several hierarchical search
strategies exist, either based on the power in frequency domain or on a
search with optimal filters. These searches require lots of computing resources
already for solitary neutron stars and are not readily extendable to neutron
stars in binary systems. Most of the neutron stars with spin frequencies above
10 Hz are located in binary systems. In order to fully exploit the capability
of the advanced LIGO and Virgo detectors and future third-generation
detectors like the Einstein telescope, a new analysis strategy has been
developed and implemented, in which a search is performed for signals with
a polynomial phase dependence in time domain. With this search strategy,
also signals with additional Doppler shifts from the binary motion can be
found. We will present out strategy with simulated data, compare it to possible
power-based strategies, and give inferred detection limits for classes of sources
for the proposed Einstein Telescope.
