Line-of-sight effects in gravitational lensing

Line-of-sight shear and beyond

10 juin 2022, 10:00

40m

Salle des doctorants (Montpellier, France)

Talk Cosmology with strong lensing

Orateur

Pierre Fleury (Institut de Physique Théorique CNRS/CEA)

Description

I will discuss the theoretical modelling of line-of-sight perturbations in strong gravitational lensing. Two points will be highlighted:
1. There exists a notion of line-of-sight shear that is, in principle, distinguishable from properties of the main lens.
2. Distortions beyond convergence and shear (flexion, etc.) could play an important role.