Tuesday

We have developed an adaptive and efficient radiative transfer scheme, SPHM1-RT, and implemented it in the tasked-based smoothed particle hydrodynamics code, SWIFT. We use this code to perform high-resolution 3D simulations of the propagation of ionization fronts from boundaries through the clumpy intergalactic medium during cosmic reionization for various redshifts and amplitudes of the imposed ionization rate. The simulations resolve the smallest mini-halos that can trap an incoming ionization front, and follow their photo-evaporation over hundreds of million years. We examine the extent to which density structure and mini-halos affect the speed of an ionization front and measure the evolving clumping factor. We discuss their implications for 21cm observations.