BeyondPlanck XII. Cosmological parameter constraints with end-to-end error propagation

Understand

We present cosmological parameter constraints as estimated using the Bayesian BeyondPlanck (BP) analysis framework.

• This method supports seamless end-to-end error propagation from raw time-ordered data to final cosmological parameters.
• As a first demonstration of the method, we analyze time-ordered Planck LFI observations, combined with selected external data (WMAP 33-61GHz, Planck HFI DR4 353 and 857GHz, and Haslam 408MHz) in the form of pixelized maps which are used to break critical astrophysical degeneracies.
• Overall, all results are generally in good agreement with previously reported values from Planck 2018 and WMAP, with the largest relative difference for any parameter of about 1 sigma when considering only temperature multipoles between 29<l<601.