Fast Weak Lensing Simulations with Halo Model

Understand

Full ray-tracing maps of gravitational lensing, constructed from N-Body simulations, represent a fundamental tool to interpret present and future weak lensing data.

• However the limitation of computational resources and storage capabilities severely restrict the number of realizations that can be performed in order to accurately sample both the cosmic shear models and covariance matrices.
• In this paper we present a halo model formalism for weak gravitational lensing that alleviates these issues by producing weak-lensing mocks at a reduced computational cost.
• Our model takes as input the halo population within a desired light-cone and the linear power spectrum of the underlined cosmological model.