Speaker
Description
The Dark Energy Survey (DES) is preparing to release its Legacy cosmological analysis based on six years of observations, comprising shape and position measurements for over 130 million galaxies across 5,000 square degrees. This unprecedented dataset enables a powerful joint study of weak gravitational lensing and galaxy clustering—commonly referred to as the 3×2pt analysis—to robustly constrain the ΛCDM model and its extensions. In this talk, I will present the development of our modeling pipeline, designed to fully exploit the statistical power of the DES Y6 data. I will highlight key components of the theoretical framework, including the modeling of baryonic feedback effects on cosmic shear, the treatment of galaxy bias in galaxy clustering and galaxy-galaxy lensing, and the mitigation of other dominant systematics. Finally, I will show validation results and discuss forecasted cosmological constraints, underscoring the expected impact of the DES Y6 analysis on our understanding of the Universe.
