The Epoch of Reionization in Warm Dark Matter Scenarios

Understand

In this paper we investigate how the Reionization process is affected by early galaxy formation in different cosmological scenarios.

• We use a semi-analytic model with suppressed initial power spectra to obtain the UV Luminosity Function in thermal Warm Dark Matter and sterile neutrino cosmologies.
• We retrace the ionization history of intergalactic medium with hot stellar emission only, exploiting fixed and variable photons escape fraction models ($f_{esc}$).
• For each cosmology, we find an upper limit to fixed $f_{esc}$, which guarantees the completion of the process at $z<6.7$.