Measurements of the CMB temperature and polarisation power spectra provide high-precision constraints on cosmological parameters and point to a value for the expansion rate today 5 sigma lower than what supernovae and distance-ladder analyses find.
While the latter analyses measure the Hubble constant directly, we must assume a given cosmological model to infer the expansion rate from CMB...
The South Pole Telescope (SPT) is observing the CMB anisotropies with arcminute resolution using its state-of-the-art camera (SPT-3G). Constraints on cosmological parameters from the obtained data will be as tight as Planck’s one, while remaining independent from the satellite experiment, thus allowing to test the consistency of the two dataset and investigate new physics. A reliable...
