Abstract

Radio observations at and below 1 GHz are a potentially powerful way to probe Reionization history and to learn about primordial star formation. In my talk I will discuss two types of observations, namely Fast Radio Bursts (FRBs) and the 21-cm line of neutral hydrogen. FRBs, discovered in 2007, are cosmological transient signals of undetermined origin detected at ~1 GHz. Dispersion measure of FRBs depends on the total column of ionized gas and can be used to directly constrain Reionization. I will discuss new ways to constrain the population of FRBs. On the other hand, the predicted 21-cm signal of neutral hydrogen contains information on the neutral Universe and can be used to study processes of star and black hole formation. I will focus on modelling the signal and discuss the latest observational constraints on the high redshift Universe.