Cosmological Weak Lensing

Oct 10, 2019 - 11:00 am to 12:00 pm
Location

SLAC, Kavli 3rd Floor Conf. Room

Speaker
Alexandre Refregier (ETH Zurich)

Weak gravitational lensing is a unique technique to map the distribution of dark matter in the universe. It is also a sensitive probe of dark energy, large scale structures in the universe, and cosmological parameters. We will first briefly describe the principles of weak lensing. We will then review the current observational status of this field, highlighting several new measurements especially from the ongoing Dark Energy Survey (DES). We will then discuss the status of tensions between cosmological probes, and a new approach based on forward modelling and machine learning.