Open and closed CDM isocurvature models contrasted with the CMB data
Astrophysics
2008-11-26 v2 High Energy Physics - Phenomenology
Abstract
We consider pure isocurvature cold dark matter models in the case of open and closed universe. We allow for a large spectral tilt and scan the 6-dimensional parameter space for the best fit to the COBE, Boomerang, and Maxima-1 data. Taking into account constraints from large-scale structure and big bang nucleosynthesis, we find a best fit with , which is to be compared to of a flat adiabatic reference model. Hence the current data strongly disfavour pure isocurvature perturbations.
Keywords
Cite
@article{arxiv.astro-ph/0108422,
title = {Open and closed CDM isocurvature models contrasted with the CMB data},
author = {Kari Enqvist and Hannu Kurki-Suonio and Jussi Valiviita},
journal= {arXiv preprint arXiv:astro-ph/0108422},
year = {2008}
}
Comments
6 pages, 6 figures. V2: Added a discussion of the effect of curvature scale on the primordial power spectrum and made minor changes to match better the Phys. Rev. D 65, 0230XX (2002)