CMB power spectra and cosmological parameters from Planck PR4 with CamSpec

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Abstract
We present angular power spectra and cosmological parameter constraints derived from the Planck PR4 (NPIPE) maps of the Cosmic Microwave Background. NPIPE, released by the Planck Collaboration in 2020, is a new processing pipeline for producing calibrated frequency maps from Planck data. We have created new versions of the CamSpec likelihood using these maps and applied them to constrain ΛCDM and single-parameter extensions. We find excellent consistency between NPIPE and the Planck 2018 maps at the parameter level, showing that the Planck cosmology is robust to substantial changes in the mapmaking. The lower noise of NPIPE leads to ~10% tighter constraints, and we see both smaller error bars and a shift toward the ΛCDM values for beyond-ΛCDM parameters including ΩK and AL.
Funding Information
  • University of Cambridge
  • Engineering and Physical Sciences Research Council (EP/T022159/1)
  • Science and Technology Facilities Council
  • National Energy Research Scientific Computing Center
  • U.S. Department of Energy
  • Office of Science
  • Lawrence Berkeley National Laboratory (DE-AC02-05CH11231)

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