Dynamical dark energy beyond Planck? Constraints from multiple CMB probes, DESI BAO, and type-Ia supernovae

The latest baryon acoustic oscillation (BAO) measurements from the Dark Energy Spectroscopic Instrument (DESI) Collaboration, when combined with Planck satellite cosmic microwave background (CMB) data and type Ia supernovae, suggest a preference for dynamical dark energy (DDE) at a significance level ranging from 2.8σ to 4.2σ. In this work, I test whether, and to what extent, this preference is supported by CMB experiments other than Planck. I analyze the latest Atacama Cosmology Telescope (ACT) and South Pole Telescope (SPT) temperature, polarization, and lensing spectra at small scales, eventually combining them with Planck or Wilkinson microwave anisotropy probe (WMAP) 9-yr observations at large angular…

• EC
  European Cooperation in Science and Technology
• SA
  Science and Technology Facilities Council

  Award: ST/X000621/1