Planck 2013 results
Free Access

Fig. A.3


Planck constraints on the spectral parameters ns,dns/ dlnk, and r. We compare constraints computed with the second-order slow-roll approximation, starting from flat priors on the HFF parameters at the pivot scale (ϵ1,ϵ2,ϵ3), with those obtained directly from ns,dns/ dlnk, and r. In the latter case we enforce the second-order consistency conditions for the tensor-to-scalar ratio and for the running of the tensor spectral index.

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