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The European Space Agency, ESA, is currently studying 4 high-energy astrophysics missions. These are Lobster-ISS, an all-sky imaging X-ray monitor, the Extreme Universe Space Observatory (EUSO) which will study the highest energy cosmic rays by using the Earth’s atmosphere as a giant detector, Rosita (ROentgen Survey with an Imaging Telescope Array), and XEUS - the X-ray Evolving Universe Spectroscopy...
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,...
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