New Paper: Stochastic Reionization from the Smallest Galaxies

Also last week, we submitted a paper, led by Pengfei Chen (now in the finance sector), on the stochastic nature of reionization during its initial phases. Here we used the galactic properties from the Renaissance Simulations as the source model in a reionization simulation. We find that before a redshift of 10 (age of the universe = 500 million years), small galaxies dominate, whose ionized regions are stochastically flicker because of the burstiness of the first galaxies. After that time, larger galaxies that have more steady star formation dominate the ionizing photon budget and contribute the majority of the photons to reionization.

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