Harnois-Deraps: Weak lensing beyond two-point statistics/ Salatino: Half-Wave Plates for CMB polarimetry

Jan 18, 2019 - 10:30 am to 11:30 am

SLAC, Kavli 3rd Floor Conf. Room

Joachim Harnois-Deraps (University of Edinburgh) / Maria Salatino (Stanford)


Massive international efforts are currently being deployed to construct predictions tools for upcoming weak lensing analyses, typically aiming at sub-percent precision. Their focuses are primarily set on two-point statistics (e.g. position and/or shape correlation functions), mainly because these can be directly related to the matter power spectrum, which can be accurately obtained from fitting functions and emulators. Weak lensing beyond the two-point statistics can play an important role however, for it has access to more cosmological information given that the matter density field has become non-Gaussian. In this talk I will review recent weak lensing data analysis based on higher order statistics, and discuss requirements for upcoming surveys, with a focus on the calibration with cosmological simulations.




Half-Wave Plates (HWPs) are optical components used in many Cosmic Microwave Background (CMB) polarimeters.


I will discuss the physics of the HWPs and some of the resulting systematic effects. I will use them to underline some general concepts in physics.