Line-of-sight effects in gravitational lensing

Session

Progress in strong-lensing methods and techniques

9 juin 2022, 10:00

Salle des doctorants (Montpellier, France)

Présidents de session

Progress in strong-lensing methods and techniques: Talks

• Il n'a pas de président de session pour ce bloc

Progress in strong-lensing methods and techniques: Discussion

• Simon Birrer (Stony Brook University)
• James Nightingale (Durham University)

1. Structure enhanced ray-tracing

Simon Birrer (Stony Brook University)

09/06/2022 10:00

Talk

large scale structure numerical simulations do not have the resolution to accurately describe all the structure on small scale relevant for strong gravitational lensing. I describe recent progress in combining N-body simulations describing the large scale structure with semi-analytical enhanced structure ray-tracing bridging the gap between week and strong lensing.

4. Line of sight effects in the past light cone of the horizon-AGN hydrodynamical simulation

Dr Raphael Gavazzi (LAM CNRS)

09/06/2022 10:40

Talk

I will present a few original aspects of the small scale properties of the lensing deflection field that arise from the full multiple plane ray-tracing.

6. From Images to Dark Matter: End-To-End Inference of Substructure From Hundreds of Strong Gravitational Lenses

Sebastian Wagner-Carena (Stanford University)

09/06/2022 11:20

Talk

Constraining the distribution of small-scale structure in our universe allows us to probe alternatives to the cold dark matter paradigm. Strong gravitational lensing offers a unique window into small dark matter halos ($<10^{10} M_\odot$) because these halos impart a gravitational lensing signal even if they do not host luminous galaxies. We create large datasets of strong lensing images with...