Fruits of the Universe series: Strong Lensing Clusters: their role and their future

by Carlo Giocoli (Laboratoire d’Astrophysique de Marseille; Cluster guest)

Thursday 16 Jun 2016, 12:30 → 13:00 Europe/Berlin

Lounge area, 1st floor (Excellence Cluster Universe)

The next generation of large sky photometric surveys will be finally able to use strong lensing by clusters as a cosmological probe. In his talk Carlo will present in particular how arc counts and strong lensing properties by clusters are sensitive to the variation of two cosmological parameters: the total matter density parameter (Omega_M) and the normalisation of the primordial power spectrum (sigma_8). He will introduce a pseudo-analytical code MOKA to generate high resolution convergence maps of galaxy clusters, using recent results from numerical simulations, and discuss how strong lensing phenomenologies are sensitive to cluster structural properties. Finally Carlo will talk about how sensible is the distribution of the Einstein radii on the cosmological parameters Omega_M – sigma_8 finding that cosmologies with higher Omega_M and sigma_8 possess a large sample of strong lensing clusters. The audience is cordially invited to discuss and comment. During this 30-minutes lunch event, we will serve drinks and fingerfood.