Improving cosmological parameter estimation with the future 21 cm observation from SKA

Understand

Future observations of 21 cm emission from neutral hydrogen survey will become a promising approach to probe the large scale structure of Universe.

• In this paper, we investigate the impacts of Square Kilometer Array (SKA) 21 cm observation on the estimation of cosmological parameters.
• We use the simulated data of the baryonic acoustic oscillation (BAO) measurements based on the future SKA experiment with the intensity mapping (IM) technique to do the analysis.
• For the current observations, we use the latest cosmic microwave background (CMB) observation from {\it Planck} 2018, the optical BAO measurements, and the Type Ia supernovae (SN) observation (Pantheon compilation).