CMB distance priors revisited: effects of dark energy dynamics, spatial curvature, primordial power spectrum, and neutrino parameters

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As a physical and sufficient compression of the full CMB data, the CMB distance priors, or shift parameters, have been widely used and provide a convenient way to include CMB data when obtaining cosmological constraints.

• In this paper, we revisit this data vector and examine its stability under different cosmological models.
• We find that the CMB distance priors are an accurate substitute for the full CMB data when probing dark energy dynamics.
• This is true when the primordial power spectrum model is directly generalized from the power spectrum of the model used in the derivation of the distance priors from the CMB data.