Abstract

Reionization is an epic event when luminous sources ionized the neutral universe. The upcoming observations will reveal reionization in unprecedented detail, including its sources and geometry. However, the progress of reionization depended also on the sinks of ionizing photons: dense gas in the intergalactic medium (IGM) absorbs more photons due to fast recombination. Recent observations and simulations show the rapid evolution of the clumpy IGM during reionization. I will present my new, adaptive, and efficient radiative transfer method, SPH-M1RT. With this method, we simulate the complex interplay between the clumpy IGM and reionization. Finally, I will discuss the applications of SPH-M1RT in galaxy simulations, especially reionization of the local universe.