Cosmic Structure Formation at High Redshift.

Iliev, Ilian T., Ahn, Kyungjin, Koda, Jun, Shapiro, Paul R and Pen, Ue-Li (2012) Cosmic Structure Formation at High Redshift. In: 45th Rencontres de Moriond 2010, La Thuile, Val d'Aosta, Italy March 13-20th 2010.

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We present some preliminary results from a series of extremely large, high-resolution N-body simulations of the formation of early nonlinear structures. We find that the high-z halo mass function is inconsistent with the Sheth-Tormen mass function, which tends to over-estimate the abundance of rare halos. This discrepancy is in rough agreement with previous results based on smaller simulations. We also show that the number density of minihaloes is correlated with local matter density, albeit with a significant scatter that increases with redshift, as minihaloes become increasingly rare. The average correlation is in rough agreement with a simple analytical extended Press-Schechter model, but can differ by up to factor of 2 in some regimes.

Item Type: Conference or Workshop Item (Paper)
Schools and Departments: School of Mathematical and Physical Sciences > Physics and Astronomy
Depositing User: Ilian Iliev
Date Deposited: 06 Feb 2012 18:33
Last Modified: 30 Nov 2012 17:00
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