A stochastic background of gravitational waves could be created by the superposition of a
large number of independent sources. The physical processes occurring at the earliest …

We present cosmological parameter results from the final full-mission Planck measurements
of the cosmic microwave background (CMB) anisotropies, combining information from the …

We present measurements of the cosmic microwave background (CMB) lensing potential
using the final Planck 2018 temperature and polarization data. Using polarization maps …

The Simons Observatory (SO) is a new cosmic microwave background experiment being
built on Cerro Toco in Chile, due to begin observations in the early 2020s. We describe the …

Cosmic inflation provides a window to the highest energy densities accessible in nature, far
beyond those achievable in any realistic terrestrial experiment. Theoretical insights into the …

We present measurements of the E-mode polarization angular auto-power spectrum (EE)
and temperature–E-mode cross-power spectrum (TE) of the cosmic microwave background …

We report a B-mode power spectrum measurement from the cosmic microwave background
(CMB) polarization anisotropy observations made using the SPTpol instrument on the South …

We present cosmological constraints based on the cosmic microwave background (CMB)
lensing potential power spectrum measurement from the recent 500 deg 2 SPTpol survey …

We introduce and validate a delensing framework for the Simons Observatory (SO), which
will be used to improve constraints on inflationary gravitational waves by reducing the …

We present a measurement of the cosmic microwave background lensing potential using
500 deg 2 of 150 GHz data from the SPTpol receiver on the South Pole Telescope. The …