Seeds of large-scale anisotropy in string cosmology

Details Seeds of large-scale anisotropy in string cosmology Seeds of large-scale anisotropy in string cosmology

1998-04-28

arxiv.org/abs/gr-qc/9804076v1

Phys.Rev.D59:043511,1999

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

27 pages, LATEX, one figure included using epsf

Scientific paper

10.1103/PhysRevD.59.043511

Pre-big bang cosmology predicts tiny first-order dilaton and metric perturbations at very large scales. Here we discuss the possibility that other -- more copiously generated -- perturbations may act, at second order, as scalar seeds of large-scale structure and CMB anisotropies. We study, in particular, the cases of electromagnetic and axionic seeds. We compute the stochastic fluctuations of their energy-momentum tensor and determine the resulting contributions to the multipole expansion of the temperature anisotropy. In the axion case it is possible to obtain a flat or slightly tilted blue spectrum that fits present data consistently, both for massless and for massive (but very light) axions.

Affiliated with

Also associated with

No associations

Rating

Seeds of large-scale anisotropy in string cosmology does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Seeds of large-scale anisotropy in string cosmology, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Seeds of large-scale anisotropy in string cosmology will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-679826