Probing dark energy with higher order weak lensing statistics
Abstract
Understanding the accelerated expansion of the Universe is one of the most important challenges of modern cosmology. Thanks to the development of large dedicated surveys (Euclid, Rubin, Roman), weak-lensing cosmic shear offers the possibility to answer this question by constraining the dark energy equation of state (w). In this presentation, I will introduce cosmic shear and its application to current state-of-the-art surveys: the Kilo Degree Survey (KiDS) and the Dark Energy Survey (DES). I will discuss the so-called cosmological tension observed between cosmic shear and cosmic microwave background constraints before reviewing future prospects to measure w with the Euclid satellite. Finally, I will show that these constraints can be significantly improved by resorting to weak-lensing mass map estimators that additionally probe the non-Gaussian part of the matter distribution.