Observatoire astronomique de Strasbourg

The abundance and radial distribution of faint and ultra-faint dwarfs in galaxy clusters

Abstract Cosmological simulations of galaxy clusters are unable to resolve dwarf galaxies due to limited numerical resolution which drives the artificial disruption of dark matter substructures. We address these limitations by combining the results of the cosmological hydrodynami...

Anisotropy of Satellite Galaxies. I. Contrasting Correlations with Central Galaxy, Host Halo, and Large-scale Filament Structures

Abstract Using the SIMBA, EAGLE, and IllustrisTNG-100 galaxy formation simulations, we examine the anisotropy of the satellite distribution and its dependencies on central galaxies, host halos, and cosmic filaments. We find that in all simulations, the satellite anisotropy is rob...