Cosmology Seminar

Tue, September 19, 2017

1:10 pm (Cosmology/ BCCP) 
Julien Carron, Sussex 
Campbell 131 
Planck CMB delensing and beyond 
The deflection of CMB photons by large-scale structures smooths the observed CMB acoustic peaks and introduces a sizeable white noise component in the polarization B-mode. In order to achieve best constraints on the inflationary perturbations tensor to scalar ratio, upcoming low-noise polarization-based experiments must be able to undo these deflections, an operation called delensing. I will present the first detection of B-mode delensing, and first internal delensing of the CMB that we recently performed on Planck public maps, as well as discuss methods and prospects for the future.