The contribution and role of low- and high-mass galaxies in the Epoch of Reionization

Abstract

Knowing the contributions and roles of both high- and low-mass galaxies during the epoch of reionization is crucial for comprehending the early cosmos and the galaxies formed in the early days of the universe. Historically, research on this topic was limited by technological constraints such as the viewable time domain of telescopes. However, technological advances and state-of-art facilities including the successful functioning of the James Webb Space Telescope (JWST) and the introduction of modern large-scale galaxy simulations have substantially improved this perplexing scenario. With this in mind, this study defines high- and low-mass galaxies during the reionization epoch and discusses how they contribute to this period in the universe's early history. The analysis introduces both the current results of astrophysicists and the limitations of scientists' research in this area. Overall, these findings show that early galaxies in the high-redshift universe are a topic with much research potential and shed light on guiding further exploration of the reionization in the universe.