•Radiation-Dominated
Era:
–Compton
Scattering is an important process that couples matter and
radiation pre/post recombination (same
temperatures).
–Exchange
of energy between radiation and matter in these states
much studied.
–Text
shows heating of electrons by Compton scattering of photons of
the microwave background radiation couples temperatures coupled
throughout the era, and until z = 550 h2/5 Ω01/5.
–