Understanding planes of satellites

I. SANTOS-SANTOS; P. TISSERA; C. BROOK; H. ARTAL; S. PEDROSA; A. SERNA; R. DOMINGUEZ-TENREIRO; M. GOMEZ-FLECHOSO

Simposio; Dwarf Galaxies: From the Deep Universe to the Present Proceedings IAU Symposium; 2018

Reproducing the planes of co-orbiting satellites observed in the MW and M31 so farhas represented a challenge for cosmological simulations. We have developed a new method tosearch for kinematically-coherent groups of satellites and applied it to 2 different cosmologicalhydro-simulations of disc galaxies. In each simulation we have found such a group, that representsroughly half of the total satellite population and is distributed on a fairly thin plane that persistsin time. These results are compatible with the MW and M31 observed planes.