Ponente
Descripción
Recently, the South Pole Telescope (SPT) released its measurements of temperature (T) and E-mode polarization power spectra of the cosmic microwave background (CMB). These measurements, made by two years of observation of 4% of the sky, are the most precise in EE and TE spectra for the multipole ranges 1800-4000 and 2200-4000, respectively. When combined with ACT-DR6 and Planck data, these three represent the most precise CMB data combination to date. In this talk, constraints on a variety of models coming from SPT data alone and in combination with ACT-DR6 and Planck are presented. The considered models include ΛCDM, a few of its extensions and Hubble tension solutions, such as modified recombination, the varying electron mass in non-flat geometry and early dark energy. The results underline the constraining power of ground-based CMB experiments, which now reaches the precision of Planck. Moreover, constraints resulting from the combination of these CMB data sets with baryon acoustic oscillations (BAO) data from DESI-DR2 are also presented. The projection of the discrepancy between CMB data and DESI-DR2 in ΛCDM on these models is also highlighted in the talk.
