Tootfinder

Analysis of the plane of satellites around Milky Way-like galaxies in $\Lambda$CDM cosmology
Xinghai Zhao, Guobao Tang, Paola Gonzalez, Grant J. Mathews, Lara Arielle Phillips
https://arxiv.org/abs/2510.02518

Analysis of the plane of satellites around Milky Way-like galaxies in $Λ$CDM cosmology
It has been suggested that the Plane of Satellites (PoS) phenomenon may imply a tension with current $Λ$CDM cosmology since a Milky-Way (MW)-like PoS is very rare in simulations. In this study, we analyze a large sample of satellite systems of MW-like galaxies in the IllustrisTNG simulations. We analyze their spatial aspect ratio, orbital pole dispersion, Gini coefficient, radial distribution, and bulk satellite velocity relative to the host galaxy. These are compared to the observed Milky~Way…