The radiation energy component of the Hubble function and a LCDM cosmological simulation
Abstract
We study some effects the inclusion of the radiation energy component in the universe, Omega_r, can have on several quantities of interest for the large-scale structure of the universe in a LCDM cosmological simulation; started at a very high redshift (z=500). In particular we compute the power spectrum density, the halo mass function, and the concentration-mass relation for haloes. We find that Omega_r has an important contribution in the long-term nonlinear evolution of structures in the universe. For instance, a lower matter density power, by approx 50%, in all scales is obtained when compared with a simulation without the radiation term. Also, haloes formed with the Omega_r taken into account are approx 20% less concentrated than when not included in the Hubble function.
Keywords
Cite
@article{arxiv.1302.4830,
title = {The radiation energy component of the Hubble function and a LCDM cosmological simulation},
author = {Hector Aceves},
journal= {arXiv preprint arXiv:1302.4830},
year = {2016}
}
Comments
This paper has been withdrawn by the author due to the use an incorrect equation for perturbations including radiation. The linear part of the spectrum should follow the P(k)