Forecasts on the Dark Energy and Primordial Non-Gaussianity Observations with the Tianlai Cylinder Array

Understand

The Tianlai experiment is dedicated to the observation of large scale structures (LSS) by the 21 cm intensity mapping technique.

• In this paper we make forecasts on its capability at observing or constraining the dark energy parameters and the primordial non-Gaussianity.
• From the LSS data one can use the baryon acoustic oscillation (BAO) and the growth rate derived from the redshift space distortion (RSD) to measure the dark energy density and equation of state.
• The primordial non-Gaussianity can be constrained either by looking for scale-dependent bias in the power spectrum, or by using the bispectrum.