Planck 2013 results
Free Access

Fig. A.1


Planck constraints on the HFFs (ϵ1,ϵ2,ϵ3) assuming either ϵ3 = 0 and the first-order slow-roll approximation for the computation of the primordial spectra, or ϵ3 ≠ 0 and the second-order slow-roll approximation (HFF GFM).

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