Sommaire:

Observations of the large-scale structure (LSS) of the Universe offer an increasingly competitive probe of dark energy, as it is shaped by the opposing effects of gravity and the accelerated expansion. Even though it is not directly observable, it can be traced by galaxies and reconstructed by the gravitational lensing signal it imprints on galaxy survey and cosmic microwave background (CMB) data. In this talk, I will present how these probes can be jointly analyzed, including their cross-correlations, to tighten constraints on cosmological parameters. I will first focus on multiprobe analyses with current galaxy and CMB surveys, in particular from the ongoing Dark Energy Survey. I will then show how to test cosmological models with multiple, correlated observations of the LSS and how multiprobe analysis will thus enable upcoming surveys, such as Rubin/LSST, Euclid and Roman/WFIRST, to track hints of new physics from massive data sets.

Pour plus d'informations, merci de contacter Lavalle J.