Lyman Alpha Absorption in The Cosmic Web

Details Lyman Alpha Absorption in The Cosmic Web Lyman Alpha Absorption in The Cosmic Web

1997-10-10

arxiv.org/abs/astro-ph/9710102v1

Astronomy and Astrophysics

Astrophysics

6 pages, LaTeX, with figure 1a,b,c,d, 2, 3 included. uses conf_iap.sty To appear in Structure and Evolution of the IGM from QS

Scientific paper

We describe large scale structure at high redshift in terms of the Cosmic Web picture for {S,Lambda,O,H}CDM models: how galactic-scale ``peak-patches'', filaments and membranes create an interconnected intergalactic medium. The ideas are applied to our Ly$\alpha$ forest simulations of ``shear-field patches''. We discuss simulation method and design, resolution dependence, the statistical combination of patches, UV flux scaling, and whether filtered Zel'dovich maps are useful. The response to changes in power spectrum shape and amplitude, and in cosmological parameters, is described. We also show Omega_b h^2 derived from UV rescaling is overestimated if the resolution is not adequate.

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