Modelling reionization often requires significant assumptions about the properties of ionizing
sources. Here, we infer the total output of hydrogen-ionizing photons (the ionizing …

The (re) ionization of hydrogen in the early universe has a profound effect on the formation
of the first galaxies: by raising the gas temperature and pressure, it prevents gas from …

It is widespread opinion that hydrogen reionization is mainly driven by primeval star-forming
galaxies, with high-z active galactic nuclei (AGNs) having a minor role. Recent observations …

Context. Nebular emission lines are powerful diagnostics for the physical processes at play
in galaxy formation and evolution. Moreover, emission-line galaxies (ELGs) are one of the …

The reionization of the Universe ends the dark ages that started after the recombination era.
In the case of H, reionization finishes around z~ 6. Faint star-forming galaxies are the best …

The increasingly neutral intergalactic gas at z> 6 impacts the Lyman-α (Lyα) flux observed
from galaxies. One luminous galaxy, COLA1, stands out because of its unique double …

Recent numerical simulations have suggested the probability of a fraction of the primordial
stars being ejected from the cluster of their origin. We explore the possibility that some of …

We study the reionization of the Universe due to haloes that host galaxies undergoing bursts
of star formation. By comparing the recent results from the James Webb Space Telescope …

The bubble size distribution of ionized hydrogen regions, which could be derived from the
tomographic imaging data of the redshifted 21 cm signal from the epoch of reionization …