Cosmological Conductive/Cooling Fronts as Lyman Alpha Forest Clouds

Details Cosmological Conductive/Cooling Fronts as Lyman Alpha Forest Clouds Cosmological Conductive/Cooling Fronts as Lyman Alpha Forest Clouds

1996-05-08

arxiv.org/abs/astro-ph/9605034v1

Astronomy and Astrophysics

Astrophysics

9 pages, plain TeX, 3 figures; ApJ Letters, accepted

Scientific paper

10.1086/310153

We propose a simple model for the origin and evolution of \lya clouds based on cosmological conductive/cooling fronts. In this model the \lya arises in the interfaces between the IGM and cold clouds that could be tentatively identified with protogalaxies. Most of the properties of the \lya absorbers are reproduced with a very restricted number of assumptions. Among these are the correct range of HI column density, cloud sizes and redshift and HI column density distributions for the absorbers. Several predictions and implications of the model are briefly discussed.

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