Lunch talk on Dec. 29, 2025

Weak Lensing Cosmology and Redshift-Dependent Sciences

Speaker: Ji Yao (SHAO)

Venue: SWIFAR Building 2111

Time: 12:45 PM, Monday, Dec. 29, 2025

Abstract: 

Weak gravitational lensing is one of the most promising cosmological probes in the near future. It is sensitive to not only cosmological matter inhomogeneity, but also neutrino mass, dark matter particle mass, and dark energy properties. The Stage IV surveys will measure the weak lensing signal with high significance, which also requires accurate removal of the systematics and denoising techniques. We investigate how redshift-dependency can help the following scenarios: (1) in removing the contamination from the intrinsic alignment of galaxies (i.e., signal+systematics); (2) in denoising the weak lensing maps (i.e., signal+noise); (3) in a detailed description of the large-scale structures. We suggest that the redshift-dependency is a critical aspect to incorporate in future cosmological studies.