Forecast for cosmological parameter estimation with gravitational-wave standard siren observation from the Cosmic Explorer. (arXiv:2001.05393v1 [astro-ph.CO])

Forecast for cosmological parameter estimation with gravitational-wave standard siren observation from the Cosmic Explorer. (arXiv:2001.05393v1 [astro-ph.CO])
<a href="http://arxiv.org/find/astro-ph/1/au:+Jin_S/0/1/0/all/0/1">Shang-Jie Jin</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+He_D/0/1/0/all/0/1">Dong-Ze He</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Xu_Y/0/1/0/all/0/1">Yidong Xu</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Zhang_J/0/1/0/all/0/1">Jing-Fei Zhang</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Zhang_X/0/1/0/all/0/1">Xin Zhang</a>

The third-generation ground-based gravitational-wave (GW) detector, Cosmic
Explorer (CE), is scheduled to start its observation in the 2030s. In this
paper, we make a forecast for cosmological parameter estimation with
gravitational-wave standard siren observation from the CE. We use the simulated
GW standard siren data of CE to constrain the $Lambda$CDM, $w$CDM and CPL
models. We combine the simulated GW data with the current cosmological
electromagnetic observations including the latest cosmic microwave background
(CMB) anisotropies data from Planck, the optical baryon acoustic oscillation
(BAO) measurements, and the type Ia supernovae (SN) observation (Pantheon
compilation) to do the analysis. We find that the future standard siren
observation from CE will improve the cosmological parameter estimation to a
great extent, since the future GW standard siren data can well break the
degeneracies generated by the optical observations between various cosmological
parameters. We also find that the CE’s constraining capability on the
cosmological parameters is slightly better than that of the same-type GW
detector, the Einstein Telescope (ET). In addition, the synergy between the GW
standard siren observation from CE and the 21 cm emission observation from SKA
is also discussed.

The third-generation ground-based gravitational-wave (GW) detector, Cosmic
Explorer (CE), is scheduled to start its observation in the 2030s. In this
paper, we make a forecast for cosmological parameter estimation with
gravitational-wave standard siren observation from the CE. We use the simulated
GW standard siren data of CE to constrain the $Lambda$CDM, $w$CDM and CPL
models. We combine the simulated GW data with the current cosmological
electromagnetic observations including the latest cosmic microwave background
(CMB) anisotropies data from Planck, the optical baryon acoustic oscillation
(BAO) measurements, and the type Ia supernovae (SN) observation (Pantheon
compilation) to do the analysis. We find that the future standard siren
observation from CE will improve the cosmological parameter estimation to a
great extent, since the future GW standard siren data can well break the
degeneracies generated by the optical observations between various cosmological
parameters. We also find that the CE’s constraining capability on the
cosmological parameters is slightly better than that of the same-type GW
detector, the Einstein Telescope (ET). In addition, the synergy between the GW
standard siren observation from CE and the 21 cm emission observation from SKA
is also discussed.

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