Mapping the reionization era through the 21 cm line emission

We will present simulations of the IGM reionization process and discuss its observability through the 21 cm line. We find that the primordial stellar sources considered in this study give a value of the reionization epoch and of the electron optical depth consistent with the observations by WMAP, without invoking the presence of additional sources of ionization. Depending on the redshift of reionization, broad-beam observations at frequencies < 100- 150 MHz with the next generation of radio telescopes should reveal angular fluctuations in the sky brightness temperature in the range 5 - 20 mK on scales < 5 arcmin.