Intergalactic baryon-rich regions at high redshift

Details Intergalactic baryon-rich regions at high redshift Intergalactic baryon-rich regions at high redshift

2008-05-15

arxiv.org/abs/0805.2191v1

Mon.Not.Roy.Astron.Soc.389:880-888,2008

Astronomy and Astrophysics

Astrophysics

9 pages, many eps figures

Scientific paper

10.1111/j.1365-2966.2008.13608.x

Using a high resolution cosmological simulation of reionization we have examined the differing structures formed by gas and dark matter at a redshift of 5.1. Baryon-rich regions form a small number of filaments, which connect the largest galaxies in the simulation. More detailed examination of the ten largest galaxies reveals long, slender gaseous filaments about 5 proper kpc in width radiating from the galaxy centers. Extending out from each filament are a few smooth, thin, nearly planar gaseous sheets. By contrast, the dark matter concentrates into quasi-spherical bodies. The results have implications for our understanding of structure formation in the early universe and of the Lyman alpha forest.

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