Radiative Transfer in a Clumpy Universe. III. The Nature of Cosmological Ionizing Sources
@article{Madau1999RadiativeTI, title={Radiative Transfer in a Clumpy Universe. III. The Nature of Cosmological Ionizing Sources}, author={Piero Madau and Francesco Haardt and Martin J. Rees}, journal={The Astrophysical Journal}, year={1999}, volume={514}, pages={648-659} }
The history of the transition from a neutral intergalactic medium (IGM) to one that is almost fully ionized can reveal the character of cosmological ionizing sources. We study the evolution of the volume filling factors of H II and He III regions in a clumpy IGM and discuss the implications for rival reionization scenarios of the rapid decline observed at z3 in the space density of optical and radio-loud quasars and of the large population of star-forming galaxies recently discovered at the…
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