Jan 25, 2013

Ali Rahmati, Leiden University

"The HI column density distribution in cosmological simulations"

I will talk about how we can calculate the HI column density distribution function by combining cosmological hydrodynamical simulations with accurate radiative transfer calculations. I will compare the results with observations and discuss the impact of different ionizing processes (i.e., the UV background, recombination radiation, collisional ionization and local stellar radiation) on the HI column density distribution.