My Papers
-
Show abstract
Weak gravitational lensing is a key probe, but classic power spectrum analyses miss non Gaussian features. We introduce an emulator that generates convergence maps directly from an input power spectrum and a target wavelet l1 norm. By tuning wavelet coefficients to match target marginal distributions and inter scale correlations, the method reproduces the input spectrum and captures higher order structure with far less simulation cost.
-
Show abstract
We derive a theory prediction for the wavelet l1 norm of convergence maps from a theory prediction of the one point distribution using Large Deviation Theory. The result agrees with simulations in the weakly non linear regime and tracks cosmological dependence, enabling an efficient path for parameter inference.
-
In preparation
Cosmological N-body simulations with topological defects
Show abstract
We couple the evolution of global defects to a relativistic N body code through the stress energy source in the metric sector and study the impact on structure formation. The framework is general, validated with controlled tests, and shows measurable signatures in density and velocity fields.