Harrison-Z'eldovich primordial spectrum is consistent with observations

Details Harrison-Z'eldovich primordial spectrum is consistent with observations Harrison-Z'eldovich primordial spectrum is consistent with observations

2010-03-24

arxiv.org/abs/1003.4763v2

Phys.Rev.D81:123509,2010

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

4 Pages, 2 Figures

Scientific paper

10.1103/PhysRevD.81.123509

Inflation predicts primordial scalar perturbations with a nearly scale-invariant spectrum and a spectral index approximately unity (the Harrison--Zel'dovich (HZ) spectrum). The first important step for inflationary cosmology is to check the consistency of the HZ primordial spectrum with current observations. Recent analyses have claimed that a HZ primordial spectrum is excluded at more than 99% c.l.. Here we show that the HZ spectrum is only marginally disfavored if one considers a more general reionization scenario. Data from the Planck mission will settle the issue.

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