Speaker
Description
(Poster) Cosmological observations are well described by the LCDM model, a universe with a cold dark matter component and a cosmological constant acting as dark energy. However, more and more cosmological tensions have emerged in the past decades, putting this simple model into question. A large amount of research has focused on the quest for an alternative model of modified gravity and dark energy, but no consensus has been reached. In this poster, I will discuss how to develop powerful tests of gravity that cover the whole range of modified gravity theories. More specifically, I will present the novel observable \hat{J}, which can be measured by combining current galaxy-galaxy lensing and galaxy clustering data from the Dark Energy Survey. By employing such model-independent tests of gravity, the next generation of cosmological surveys offers remarkable prospects for testing our cosmological model and potentially discovering new physics.
