Loitering universe models in light of the CMB
Astrophysics
2009-11-10 v2 High Energy Physics - Phenomenology
Abstract
Spatially flat loitering universe models have recently been shown to arise in the context of brane world scenarios. Such models allow more time for structure formation to take place at high redshifts, easing, e.g., the tension between the observed and predicted evolution of the quasar population with redshift. While having the desirable effect of boosting the growth of structures, we show that in such models the position of the first peak in the power spectrum of the cosmic microwave background anisotropies severely constrains the amount of loitering at high redshifts.
Cite
@article{arxiv.astro-ph/0501342,
title = {Loitering universe models in light of the CMB},
author = {O. Elgaroy and D. F. Mota and T. Multamaki},
journal= {arXiv preprint arXiv:astro-ph/0501342},
year = {2009}
}
Comments
4 pages, 3 figures. Included discussion of the linear growth factor. Matches version accepted for publication in PRD