Cosmic microwave background (CMB)

Articles produced by the “Cosmic microwave background (CMB)” group

Improved limits on the tensor-to-scalar ratio using BICEP and Planck

Post author:tristram
Post published:15 December 2021
Post category:A2C Cosmic microwave background (CMB)Publication

We present constraints on the tensor-to-scalar ratio r using a combination of BICEP/Keck 2018 and Planck PR4 data allowing us to fit for r consistently with the six parameters of…

Improved constraint on the primordial gravitational-wave density using recent cosmological data and its impact on cosmic string models

Post author:robinet
Post published:8 January 2015
Post category:A2C Cosmic microwave background (CMB)Gravitational waves Publication

Abstract: (IOP) The production of a primordial stochastic gravitational-wave (GW) background by processes occuring in the early Universe is expected in a broad range of models. Observing this background would…