Distinguishing types of compact-object binaries using the gravitational-wave signatures of their mergers

作者:Mandel Ilya*; Haster Carl Johan; Dominik Michal; Belczynski Krzysztof
来源:Monthly Notices of the Royal Astronomical Society, 2015, 450(1): L85-L89.
DOI:10.1093/mnrasl/slv054

摘要

We analyse the distinguishability of populations of coalescing binary neutron stars, neutron-star black hole binaries, and binary black holes, whose gravitational-wave signatures are expected to be observed by the advanced network of ground-based interferometers LIGO and Virgo. We consider population-synthesis predictions for plausible merging binary distributions in mass space, along with measurement accuracy estimates from the main gravitational-wave parameter-estimation pipeline. We find that for our model compact-object binary mass distribution, we can always distinguish binary neutron stars and black hole-neutron-star binaries, but not necessarily black hole-neutron-star binaries and binary black holes; however, with a few tens of detections, we can accurately identify the three subpopulations and measure their respective rates.