Speaker
Mr
Daniel Gilman
(UCLA)
Description
The particle nature of dark matter determines the abundance and density profiles of dark matter halos. On sub-galactic mass scales differences between various dark matter models become especially pronounced. Strong gravitational lensing by galaxies offers a direct probe of dark matter structure in this low-mass regime where halos contain little to no stars, and are therefore invisible. I will describe how dark matter structure affects the observables in strong lens systems, and recent constraints on the free-streaming length of dark matter and the mass of a thermal relic dark matter particle from a joint analysis of eight quadruply-imaged quasars.
Authors
Mr
Daniel Gilman
(UCLA)
Dr
Simon Birrer
Dr
Anna Nierenberg
Dr
Tommaso Treu
Dr
Andrew Benson
Dr
Xiaolong Du
