Cake Talk by Aniket Bhagwat
Feedback from supernovae and radiation emitted by stars plays a pivotal role in shaping the early universe. These feedback processes have a direct influence on gas and stellar dynamics, leaving discernible traces in observational data. I use SPICE, a suite of radiation-hydrodynamical simulations targeting cosmic reionisation to model emission line properties of the first galaxies. SPICE uses RAMSES-RT to track the propagation of radiation from stars and employs a galaxy formation model with a focus on resolving the multiphase interstellar medium down to ~15 pc scales. Furthermore, SPICE systematically probes a variety of stellar feedback models, including "bursty" and "smooth" modes of supernova energy injections. I demonstrate that subtle differences in the behaviour of supernova feedback can drive profound differences in reionisation histories, morphologies and emission line properties of the first galaxies. With a focus on Lyα, [C II] and Hα emission lines, I exploit the different models in SPICE to understand if a multi-wavelength study can help constrain stellar feedback at z>5