The Reionization History in the Lognormal Model

Details The Reionization History in the Lognormal Model The Reionization History in the Lognormal Model

2003-12-31

arxiv.org/abs/astro-ph/0312653v1

Astrophys.J. 605 (2004) 591-598

Astronomy and Astrophysics

Astrophysics

AAS Latex file, 29 pages, 6 figures included, accepted for publication in ApJ

Scientific paper

10.1086/382525

We study the evolution of baryonic gas before the reionization in the lognormal (LN) model of cosmic clustering. We show that the thermal history of the universe around the reionization can roughly be divided into three epochs: 1) cold dark age $z>z_r$, in which baryon gas is neutral, and opaque to Ly$\alpha$ photons; 2) hot dark age $z_r > z> z_{gp}$, in which a predominant part of baryon gas is ionized and hot, but it is still opaque to Ly$\alpha$ photons; 3) bright age $z

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