Speaker
Description
Cosmological information contained within the non-linear regime of the Universe may prove crucial in solving the tension currently observed between weak lensing and CMB probes. However, this information lies beyond the reach of our conventional analyses which use two-point statistics. In this talk, I present the improvements in cosmological constraining power offered by an alternative weak lensing statistic, the projected matter density PDF. For realistic lensing survey specifications, this statistic yields >50% improvements in the constraints on the matter energy density parameter, $Ω_m$, and the amplitude of the matter power spectrum, $Ï_8$. We also find significantly improved precision for the Hubble parameter, $H_0$, and the dark energy equation of state parameter, $w_0$. I will demonstrate how these gains in cosmological constraining power can be made reality with tailored numerical simulations paired and machine learning.
