Cosmology seminar: Camille Bonvin

Camille Bonvin is a researcher at CERN, Switzerland.

Relativistic effects in large-scale structure

A key challenge in cosmology is to understand the current accelerated expansion of the universe. The distribution of galaxies, as well as their observed shape and size provide a powerful way to probe dark energy and modified gravity models. In order to exploit these observables properly it is necessary to understand what we are really measuring when we look at the distribution, sizes and shapes of galaxies. Since our universe is not completely homogeneous and isotropic, we only see a distorted picture of our sky. In this talk, I will discuss the various relativistic effects that distort our observations. I will show that even though these effects complicate the interpretation of galaxy surveys, they are very useful since they contain information on the dynamic of the universe and can therefore be regarded as a new opportunity for future surveys.

Organizer

Phil Bull
Published June 8, 2015 1:34 PM - Last modified June 16, 2015 4:24 PM