Abstract: I will show weak lensing results from the Sloan Digital Sky Survey and the Dark Energy Survey. From Sloan data we use new methods to measure the mass distributon and clustering of cosmic voids and filaments. We also measure the ellipticity of galaxy and cluster halos and relate it to the light. These new measurements of voids and galaxies open new avenues to test theories of gravity and dark matter. With the Dark Energy Survey, we have made wide field mass maps and related them to the galaxy distribution and to the mass map from CMB lensing.

http://www.princeton.edu/cosmology/gravity-group-seminar/