Satellite accretion in a ΛCDM Universe

We use a dark matter only simulation to study the accretion of satellites in a ΛCDM model. The large volume and resolution of the simulation enabled us to identify ~366,000 massive host haloes (Mvir ≥ 10¹² M☉) surrounded by ~953,000 satellites. This sample allowed us to study the radial velocity profile of all satellites as a function of their distance to the primary object. Furthermore, we analysed the dependence of the radial velocity distribution with respect to the mass of the host and the properties of the haloes that are being accreted, such as their mass, shape, spin and angular momentum.