Astrophysics Seminar

Astrolunch: Ana Acebron Muñoz

Tue, 13/03/2018 - 12:30 to 13:30

Strong lensing clusters as powerful tools
Strong gravitational lensing (SL) is nowadays at the very heart of important issues in modern cosmology, which I will address in my talk. SL allows, for instance, to map the dark matter (DM) distribution of galaxy cluster’s cores, to image very high redshift sources otherwise too faint to be detected or to constrain the geometry of the Universe.

Extraordinary Astrolunch: Noemie Globus

Thu, 01/11/2018 - 12:30 to 13:30

Title: On the origin of the ultra-high energy cosmic-rays
Abstract: The origin of the ultra-high energy cosmic-rays (UHECRs) is still unknown. I will show that the observational data on the spectrum and composition can be explained by a generic model having one Galactic component and one extragalactic component. I will review the constrains brought by neutrino and gamma-ray experiments on UHECR origin. I will also discuss the origin of the UHECR dipole anisotropy recently reported by the Pierre Auger Observatory.