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Radiative transfer through the intergalactic medium

Bolton, James; Meiksin, Avery; White, Martin


Avery Meiksin

Martin White


We use a probabilistic method to compute the propagation of an ionization front corresponding to the reionization of the intergalactic medium in a Λ-cold dark matter (ΛCDM) cosmology, including both hydrogen and helium. The effects of radiative transfer substantially boost the temperature of the ionized gas over the case of uniform reionization. The resulting temperature–density relation of the ionized gas is both non-monotonic and multiple-valued, reflecting the non-local character of radiative transfer and suggesting that a single polytropic relation between local gas density and temperature is a poor description of the thermodynamical state of baryons in the post-reionization universe.

Journal Article Type Article
Acceptance Date Dec 18, 2003
Online Publication Date Mar 1, 2004
Publication Date 2004-03
Deposit Date Dec 27, 2022
Print ISSN 0035-8711
Electronic ISSN 1365-2966
Publisher Oxford University Press
Peer Reviewed Peer Reviewed
Volume 348
Issue 3
Pages L43-L48
Public URL
Publisher URL