Cosmic Microwave Background anisotropies and extra dimensions in String Cosmology

Details Cosmic Microwave Background anisotropies and extra dimensions in String Cosmology Cosmic Microwave Background anisotropies and extra dimensions in String Cosmology

1999-05-26

arxiv.org/abs/astro-ph/9905327v3

Phys.Rev.Lett. 83 (1999) 4464-4467

Astronomy and Astrophysics

Astrophysics

4 pages, 3 figures, to appear in Physical Review Letters

Scientific paper

10.1103/PhysRevLett.83.4464

A recently proposed mechanism for large-scale structure in string cosmology --based on massless axionic seeds-- is further analyzed and extended to the acoustic-peak region. Existence, structure, and normalization of the peaks turn out to depend crucially on the overall evolution of extra dimensions during the pre-big bang phase: conversely, precise cosmic microwave background anisotropy data in the acoustic-peak region will provide, within the next decade, a window on string-theory's extra dimensions before their eventual compactification.

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