I am a fourth year PhD student in Physics at Cavendish Astrophysics, University of Cambridge. I work on data analysis techniques for global or sky-averaged 21-cm cosmology as part of the REACH collaboration under the supervision of Dr Eloy de Lera Acedo, Dr Will Handley and Dr Anastasia Fialkov.
21-cm cosmology is a field of study which aims to track the redshifted 21-cm emission from neutral hydrogen throughout cosmic history in an effort to determine when the first galaxies formed and what those galaxies were like. We know very little about the first luminous objects to form between the CMB and the current era of the galaxies dominated by large scale structure. While probes like JWST give us a window to distant galaxies, as far back as z=16, 21-cm cosmology can provide statistical information about the population of galaxies over the redshift range z = 5 - 150.
I have worked on foreground modelling techniques using maximally smooth functions, neural network signal emulators, density estimation with normalising flows and the application of these tools to real data from EDGES, LEDA, SARAS2 and SARAS3.
