Speaker
Description
The epoch of reionization marks the emergence of the first galaxies that emit light into the intergalactic medium, leading to the ionisation and heating of the Universe. This phase is at the forefront of astrophysics, serving as the era where the 'seeds' for modern-day galaxies were formed. While our current understanding relies on theoretical models of early galaxy formation within the standard cold dark matter (CDM) cosmology, recent observations, including early galaxy data from the James Webb Space Telescope (JWST) and the thermal evolution of intergalactic medium from the Experiment to Detect the Global EoR Signature (EDGES), have raised questions about this conventional view. In this talk, I will discuss the insights gained from current observations regarding the nature of dark matter and dark energy, as well as the future prospects for refining these constraints. Additionally, I will explore the potential of the Square Kilometre Array (SKA) telescope, a more powerful instrument poised to observe the intergalactic medium during these early cosmic epochs. I will present a forecast study on the capability of SKA to study cosmological models, shedding light on its role in advancing our understanding of the universe.
