Precision weak lensing and the dispersion in the stellar-to-halo mass relation.

Wednesday September 16th 2020 @12pm, Zoom Colloquium
Pol Gurri Perez Swinburne University

Email: pgurriperez@swin.edu.au

Abstract

Weak gravitational lensing provides an observational avenue to determine the relation between the halo mass and stellar mass of a galaxy. While we expect two galaxies with the same stellar mass to have different halos, at the moment, existing weak lensing studies are only sensitive to an average halo mass. In this talk, I will present an end-to-end methodology to measure the effects of weak lensing on individual galaxy-galaxy systems exploiting their kinematic information. I will present the results of analysing 21 weakly lensed systems and present ways to overcome weak lensing limitations and be sensitive to the dispersion in halo masses.


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