Instituto de Astronomía Teórica y Experimental

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...

ODIN: Confirmation and 3D Reconstruction of Six Massive Protoclusters at Cosmic Noon

Abstract Protoclusters represent sites of accelerated galaxy formation and extreme astrophysical activity characteristic of dense environments. Identifying massive protoclusters and mapping their spatial structures are therefore crucial for understanding how large-scale environme...