We derived astroparticle constraints in different dark matter scenarios that are alternatives
to cold dark matter (CDM): thermal relic warm dark matter, WDM; fuzzy dark matter, yDM; selfinteracting
dark matter, SIDM; sterile neutrino dark matter, nDM. Our framework is based on updated
determinations of the high-redshift UV luminosity functions for primordial galaxies to redshift z 10,
on redshift-dependent halo mass functions in the above DM scenarios from numerical simulations,
and on robust constraints on the reionization history of the Universe from recent astrophysical and
cosmological datasets. First, we built an empirical model of cosmic reionization characterized by
two parameters, namely the escape fraction fesc of ionizing photons from primordial galaxies, and
the limiting UV magnitude Mlim
UV down to which the extrapolated UV luminosity functions steeply
increased. Second, we performed standard abundance matching of the UV luminosity function
and the halo mass function, obtaining a relationship between UV luminosity and the halo mass,
whose shape depends on an astroparticle quantity X specific to each DM scenario (e.g., WDM
particle mass); we exploited such a relationship to introduce (in the analysis) a constraint from
primordial galaxy formation, in terms of the threshold halo mass above which primordial galaxies
can efficiently form stars. Third, we performed Bayesian inference on the three parameters fesc,
Mlim
UV, and X via a standard MCMC technique, and compared the outcomes of different DM scenarios
on the reionization history. We also investigated the robustness of our findings against educated
variations of still uncertain astrophysical quantities. Finally, we highlight the relevance of our
astroparticle estimates in predicting the behavior of the high-redshift UV luminosity function at faint,
yet unexplored magnitudes, which may be tested with the advent of the JamesWebb Space Telescope
