Dynamics of substructures in warm dark-matter cosmologies

TL;DR

This study compares the properties of subhalos in cold and warm dark matter cosmologies through simulations, aiming to use subhalo dynamics as a probe to distinguish between these models.

Contribution

It provides a comparative analysis of substructure dynamics in CDM and WDM cosmologies using cosmological simulations, highlighting potential observational probes.

Findings

Differences in subhalo spatial distributions between CDM and WDM.

Variations in subhalo kinematic properties across models.

Potential of subhalo dynamics to distinguish dark matter types.

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.