Probing Primordial Non-Gaussianity with Weak Lensing Minkowski Functionals

Understand

We study the cosmological information contained in the Minkowski Functionals (MFs) of weak gravitational lensing convergence maps.

• We show that the MFs provide strong constraints on the local type primordial non-Gaussianity parameter f_NL.
• We run a set of cosmological N-body simulations and perform ray-tracing simulations of weak lensing, to generate 100 independent convergence maps of 25 deg^2 field-of-view for f_NL = -100, 0 and 100.
• We perform a Fisher analysis to study the degeneracy among other cosmological parameters such as the dark energy equation of state parameter w and the fluctuation amplitude sigma_8.