Standard-siren cosmology using gravitational waves from binary black holes. (arXiv:2004.00036v3 [astro-ph.CO] UPDATED)
<a href="http://arxiv.org/find/astro-ph/1/au:+You_Z/0/1/0/all/0/1">Zhi-Qiang You</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Zhu_X/0/1/0/all/0/1">Xing-Jiang Zhu</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Ashton_G/0/1/0/all/0/1">Gregory Ashton</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Thrane_E/0/1/0/all/0/1">Eric Thrane</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Zhu_Z/0/1/0/all/0/1">Zong-Hong Zhu</a>
Gravitational-wave astronomy provides a unique new way to study the expansion
history of the Universe. In this work, we investigate the impact future
gravitational-wave observatories will have on cosmology. Third-generation
observatories like the Einstein Telescope and Cosmic Explorer will be sensitive
to essentially all of the binary black hole coalescence events in the Universe.
Recent work by cite{farr2019future} points out that features in the
stellar-mass black hole population break the mass-redshift degeneracy,
facilitating precise determination of the Hubble parameter without
electromagnetic counterparts or host galaxy catalogues. Using a hierarchical
Bayesian inference model, we show that with one year of observations by the
Einstein Telescope, the Hubble constant will be measured to $lesssim 1%$. We
also show that this method can be used to perform Bayesian model selection
between cosmological models. As an illustrative example, we find that a
decisive statement can be made comparing the $Lambda$CDM and RHCT cosmological
models using two weeks of data from the Einstein Telescope.
Gravitational-wave astronomy provides a unique new way to study the expansion
history of the Universe. In this work, we investigate the impact future
gravitational-wave observatories will have on cosmology. Third-generation
observatories like the Einstein Telescope and Cosmic Explorer will be sensitive
to essentially all of the binary black hole coalescence events in the Universe.
Recent work by cite{farr2019future} points out that features in the
stellar-mass black hole population break the mass-redshift degeneracy,
facilitating precise determination of the Hubble parameter without
electromagnetic counterparts or host galaxy catalogues. Using a hierarchical
Bayesian inference model, we show that with one year of observations by the
Einstein Telescope, the Hubble constant will be measured to $lesssim 1%$. We
also show that this method can be used to perform Bayesian model selection
between cosmological models. As an illustrative example, we find that a
decisive statement can be made comparing the $Lambda$CDM and RHCT cosmological
models using two weeks of data from the Einstein Telescope.
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