Dark Energy Survey Y6 Cosmic Shear
Weak gravitational lensing, the distortion of galaxy shapes due to weak gravitational lensing, serves as a powerful probe of the underlying matter distribution in the Universe and the nature of dark energy. Cosmic shear, which is a two point correlation function of weakly-lensed galaxy shapes, can directly probe the structures along the line of sight. The final analysis of Dark Energy Survey (DES) data, a photometric survey that has scanned the southern sky, will offer an unprecedented opportunity to study cosmic shear with high statistical power.
Figure: Cosmological constraints (clustering amplitude: \(S_8\) and total matter density: \(\Omega_m\)) from DES Y6 cosmic shear, in comparison to other lensing surveys.