Proposed space-based gravitational-wave (GW) detectors such as DECIGO and BBO will detect ∼106 neutron-star (NS) binaries and determine the luminosity distances to the binaries with high precision. Combining the luminosity distances with cosmologically-induced phase corrections on the GWs, cosmological expansion out to high redshift can be measured without the redshift determinations of host galaxies by electromagnetic observation and can be a unique probe for dark energy. This article is based on the results obtained in [1] where we investigated constraining power of the GW standard siren without redshift information on the equation of state of dark energy with future space-based GW detectors. We also compare the results with those obtained with other instruments and methods.
@article{arxiv.1204.2877,
title = {Gravitational-wave standard siren without redshift identification},
author = {Atsushi Nishizawa and Kent Yagi and Atsushi Taruya and Takahiro Tanaka},
journal= {arXiv preprint arXiv:1204.2877},
year = {2015}
}
Comments
10 pages, 3 figures, accepted to Journal of Physics: Conference Series as Proceedings of Amaldi 9