Impact of general reionization scenarios on extraction of inflationary parameters

Details Impact of general reionization scenarios on extraction of inflationary parameters Impact of general reionization scenarios on extraction of inflationary parameters

2010-09-28

arxiv.org/abs/1009.5433v1

Phys.Rev.D82:123527,2010

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

10 Pages, 9 figures

Scientific paper

10.1103/PhysRevD.82.123527

Determination of whether the Harrison--Zel'dovich spectrum for primordial scalar perturbations is consistent with observations is sensitive to assumptions about the reionization scenario. In light of this result, we revisit constraints on inflationary models using more general reionization scenarios. While the bounds on the tensor-to-scalar ratio are largely unmodified, when different reionization schemes are addressed, hybrid models are back into the inflationary game. In the general reionization picture, we reconstruct both the shape and amplitude of the inflaton potential. We find a broader spectrum of potential shapes when relaxing the simple reionization restriction. An upper limit of $10^{16}$ GeV to the amplitude of the potential is found, regardless of the assumptions on the reionization history.

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