Cosmic Reionization on Computers: Evolution of the Flux Power Spectrum – on September 27, 2021 at 10:00 am

We explore the evolution of the flux power spectrum in the Cosmic
Reionization On Computers (CROC) simulations. We find that, contrary to some
previous studies, the shape of the flux power spectrum is rather insensitive to
the timing of reionization. However, the amplitude of the flux power spectrum
does strongly evolve with time, and that evolution is almost perfectly
correlated with the timing of reionization. We show how such correlation can be
used in a (futuristic) measurement to determine the redshift of overlap of
ionized bubbles.
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