Dynamics of substructures in warm dark-matter cosmologies

¹ Institut für Astronomie, Universität Wien, Türkenschanzstraße 17, 1180 Wien, Austria
² Astrophysikalisches Institut Potsdam, An der Sternwarte 16, 14482 Potsdam, Germany
³ Centre for Astrophysics and Supercomputing, Swinburne University of Technology, Hawthorn 3122, Victoria, Australia
⁴ Centre for Astrophysics, University of Central Lancashire, Preston PR1 2HE, UK

Abstract

We performed cosmological simulations based upon both a cold dark matter (CDM) and a warm dark matter (WDM) model. The focus of our investigations lies with selected spatial and kinematic properties of substructure halos (subhalos) orbiting within host halos, that form in both dark-matter cosmologies. We aim at using the dynamics of the subhalos as a probe of the respective cosmology.