Colloque national CMB-France #3

Session

Session #1

20 juin 2022, 14:30

4. Searching for physics beyond the standard model with Planck, SPT, and ACT data.

Lennart Balkenhol (University of Melbourne)

20/06/2022 14:30

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...

5. Building SPT3G 2019/2020 likelihood

Etienne Camphuis (Institut d'Astrophysique de Paris)

20/06/2022 15:10

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...

9. Simultaneous determination of miscalibrated polarization angles and cosmic birefringence from Planck PR4

Patricia DIEGO-PALAZUELOS

20/06/2022 16:20

We present a new implementation of the methodology proposed in Minami et al. (2019) for the simultaneous determination of cosmic birefringence and the miscalibration of polarization angles based on a fast and analytical maximum likelihood solution iterative algorithm. Following the hint of the 2.4σ cosmic birefringence signal of β = 0.35◦ ± 0.14◦ found by Minami & Komatsu (2020) in Planck 2018...