Seminario dott. Roberto Maoli Titolo- Cosmic shear: from its first detection to Euclid mission
Ore 12.00- Roberto Maoli
Titolo- Cosmic shear: from its first detection to Euclid mission
Abstract- Gravitational lensing is a relativistic effect due to the banding of light when it passes through a gravitational potential. It is the only direct method to observe the dark matter in the universe and a very powerful probe to investigate dark matter and dark energy properties. Cosmic shear is a coherent distortion of the shape of background galaxies when their light is deflected by the large scale structure of the universe. It is one of the most efficient tool to study the galaxy evolution and the geometry of the Universe but it requires high quality and very deep images of a wide area of the sky. I will illustrate some results starting from cosmic shear first detection in 2000 and focusing on the perspective of the future space mission Euclid that will be launched in 2023.