Cosmic microwave background (CMB)

PhD 2024-2027 – Hunting for new physics with Simons Observatory first cosmological data

Post author:robinet
Post published:30 October 2023
Post category:A2C Cosmic microwave background (CMB)PhD

Thesis description In April 2024, the Simons Observatory’s (SO) [1] large aperture telescope will obtain its first light. This telescope, equipped with a 6m primary mirror and a focal plane…

Cosmological parameters derived from the final (PR4) Planck data release

Post author:tristram
Post published:25 October 2023
Post category:A2C Cosmic microwave background (CMB)

We present constraints on cosmological parameters using maps from the last Planck data release (PR4). In particular, we detail an upgraded version of the cosmic microwave background likelihood, HiLLiPoP, based…

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…