Argentine National Observatory

Nonlinear steepening of a fast magneto-acoustic wave in the vicinity of a coronal magnetic null point

Abstract The interaction of a fast magneto-acoustic wave with a magnetic null point is studied in the context of the sympathetic flare phenomenon. Attention is paid to the steepening of the wave caused by the finite-amplitude effects in a non-uniform plasma environment. The null...

CNN+FoF: application of deep learning to the identification of dark matter haloes

Abstract We present a deep-learning-based approach for identifying dark matter haloes in cosmological N-body simulations. Our framework consists of a volumetric Convolutional Neural Network to classify individual simulation particles as either halo or non-halo members, followed b...

Improved recipes for peculiar velocity power spectra using Evolution Mapping

Abstract We present new fitting functions for the velocity divergence auto- and cross-power spectra, Pθθ(k) and Pδθ(k), calibrated on gravity-only N-body simulations. By applying the Evolution Mapping framework, we revise existing prescriptions to introduce a physically motivated...