Fig. C.2
Effect on cosmological parameter constraints of replacing the WMAP low-ℓ polarization likelihood with a prior of τ = 0.07 ± 0.013, which prefers lower values of the optical depth. The top-left sub-plot is ns in the base ΛCDM model, while the others are for one-parameter extensions. Each sub-plot shows results from independent CosmoMC analyses of the corresponding model.
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