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RESEARCH PRODUCT

Harrison-Zel'dovich primordial spectrum is consistent with observations

Stefania PandolfiElena GiusarmaEdward W. KolbMassimiliano LattanziAlessandro MelchiorriOlga Mena RequejoAsantha CoorayPaolo Serra

subject

Inflation (cosmology)PhysicsHigh Energy Astrophysical Phenomena (astro-ph.HE)Nuclear and High Energy PhysicsCosmology and Nongalactic Astrophysics (astro-ph.CO)Scalar (mathematics)Spectral densityFOS: Physical sciencesFísicaAstrophysicsGeneral Relativity and Quantum Cosmology (gr-qc)Astrophysics::Cosmology and Extragalactic AstrophysicsCMB cold spotGeneral Relativity and Quantum CosmologyCosmologyHigh Energy Physics - Phenomenologysymbols.namesakeGeneral Relativity and Quantum CosmologyHigh Energy Physics - Phenomenology (hep-ph)Observational cosmologysymbolsPlanckAstrophysics - High Energy Astrophysical PhenomenaReionizationAstrophysics - Cosmology and Nongalactic Astrophysics

description

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.

yearjournalcountryeditionlanguage
2010-06-09
10.1103/physrevd.81.123509http://hdl.handle.net/10550/37912