Research Projects

The James Webb space Telescope (JWsT) has begun observing galaxies at redshift 10 and beyond, which are the first generation of galaxies believed to be responsible for the reionisation of the intergalactic medium. These high redshift galaxies have been speculative and extrapolated from their low redshift counterparts. In a series of papers, semi-analytical models have been built to explain the observed UV luminosity functions of galaxies up to z=10. These models have also enabled us to understand the nature of supernova feedback, reionisation feedback, and metal production in the universe. The JWsT will allow us to test this hypothesis, constraining the nature of these high redshift, first generation galaxies and how different feedback affects their star formation. The signature of these early galaxies will be imprinted in the redshifted 21cm signal, which will be probed by the sKA and others. This will allow us to predict the resulting 21cm signal by these early galaxies and compare it with the observations.