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Harrison-Zel'dovich primordial spectrum is consistent with observations

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Harrison-Zel'dovich primordial spectrum is consistent with observations

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Pandolfi, Stefania; Giusarma, Elena; Kolb, Edward W.; Lattanzi, Massimiliano; Melchiorri, Alessandro; Mena Requejo, Olga; Cooray, Asantha; Serra, Paolo

Aquest document és un/a article, creat/da en: 2010

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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