Testing gravity with relativistic effects in large-scale structure

Astronomy Unit Seminars
Camille Bonvin
Alkistis Pourtsidou
February 2nd, 2018 at 14:30
GO Jones Room 610
The distribution of galaxies provides a powerful way to probe the properties of our universe. In order to exploit this observable properly it is necessary to understand what we are really measuring when we look at the large-scale structure. 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 about the theory of gravity and can therefore be used to test specific properties of modified gravity models.