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Paper detail

Harrison-Z'eldovich primordial spectrum is consistent with observations

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.

preprint2010arXivOpen access
S. PandolfiA. CoorayE. GiusarmaE. W. KolbA. MelchiorriO. MenaP. Serra
astro-ph.COhep-phastro-ph.HEgr-qc
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S. PandolfiA. CoorayE. GiusarmaE. W. KolbA. MelchiorriO. MenaP. Serra

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