http://arxiv.org/abs/2301.03854
This conference proceedings paper provides a short summary of the constraints presented in Menci et al. 2016, 2017 on the mass of thermal WDM candidates, and of the results presented in Romanello et al. 2021 on how Reionization scenarios are affected by early galaxy formation in WDM cosmologies. The abundance of galaxies in the epoch of reionization ($z>$6) is dependent on fundamental cosmological parameters, most importantly on the properties of dark matter, such that it can be used as a powerful cosmological probe. Here we show how the number density of primordial galaxies allows to constrain the mass of thermal WDM candidates, and we discuss the constraints that will be made possible by future JWST observations. We then 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. For each cosmology, we find an upper limit to fixed $f_{esc}$, which guarantees the completion of the process at $z<6.7$.
M. Castellano, N. Menci and M. Romanello
Wed, 11 Jan 23
27/80
Comments: Conference Proceedings of the “Vulcano Workshop 2022 – Frontier Objects in Astrophysics and Particle Physics”. Frascati Physics Series Vol. 74 (2022)
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