Non-linear Matter Spectra in Coupled Quintessence
Cosmology and Nongalactic Astrophysics
2014-04-11 v4 High Energy Physics - Phenomenology
Abstract
We consider cosmologies in which a dark-energy scalar field interacts with cold dark matter. The growth of perturbations is followed beyond the linear level by means of the time-renormalization-group method, which is extended to describe a multi-component matter sector. Even in the absence of the extra interaction, a scale-dependent bias is generated as a consequence of the different initial conditions for baryons and dark matter after decoupling. The effect is enhanced significantly by the extra coupling and can be at the 2-3 percent level in the range of scales of baryonic acoustic oscillations. We compare our results with N-body simulations, finding very good agreement.
Cite
@article{arxiv.0911.5396,
title = {Non-linear Matter Spectra in Coupled Quintessence},
author = {F. Saracco and M. Pietroni and N. Tetradis and V. Pettorino and G. Robbers},
journal= {arXiv preprint arXiv:0911.5396},
year = {2014}
}
Comments
20 pages, 6 figures, typo corrected