CMB anisotropies in pre-big bang cosmology
Astrophysics
2009-10-31 v2 High Energy Physics - Phenomenology
Abstract
We present an alternative scenario for cosmic structure formation where initial fluctuations are due to Kalb-Ramond axions produced during a pre-big bang phase of inflation. We investigate whether this scenario, where the fluctuations are induced by seeds and therefore are of isocurvature nature, can be brought in agreement with present observations by a suitable choice of cosmological parameters. We also discuss several observational signatures which can distinguish axion seeds from standard inflationary models.
Cite
@article{arxiv.astro-ph/0011197,
title = {CMB anisotropies in pre-big bang cosmology},
author = {Filippo Vernizzi and Alessandro Melchiorri and Ruth Durrer},
journal= {arXiv preprint arXiv:astro-ph/0011197},
year = {2009}
}
Comments
To appear in "Cosmology and Particle Physics" eds J. Garcia-Bellido, R. Durrer, and M. Shaposhnikov, 4 pages, 4 figures, LaTeX uses aipproc2.sty (included), corrected some typos