EDP Sciences
Planck 2015 results
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Fig. 42


Marginalized posterior for A2s → 1s, obtained using CosmoRec, with and without small-scale polarization data. We find good agreement with the theoretical value of A2s → 1s = 8.2206 s-1. For comparison, we also show the result for Planck TT,TE,EE+lowP+BAO obtained with recfast, emphasizing the consistency of different treatments.