A Mass Dependent Density Profile from Dwarfs to Clusters

TL;DR

This paper extends a mass-dependent density profile model from galaxies to clusters, using simulations to accurately describe dark matter profiles across a wide mass range.

Contribution

It introduces a mass-dependent Dekel-Zhao density profile applicable from dwarf galaxies to galaxy clusters, based on new simulation data.

Findings

The profile fits galaxy density data well.

The profile accurately describes cluster density profiles.

The extension confirms the model's broad applicability.

Abstract

In this paper, we extend the work of Freundlich et al. 2020 who showed how to obtain a Dekel-Zhao density profile with mass dependent shape parameters in the case of galaxies. In the case of Freundlich et al. 2020, the baryonic dependence was obtained using the NIHAO set of simulations. In our case, we used simulations based on a model of ours. Following Freundlich et al. 2020, we obtained the dependence from baryon physics of the two shape parameters, obtaining in this way a mass dependent Dekel-Zhao profile describing the dark matter profiles from galaxies to clusters of galaxies. The extension to the Dekel-Zhao mass dependent profile to clusters of galaxies is the main result of the paper. In the paper, we show how the Dekel-Zhao mass dependent profile gives a good description of the density profiles of galaxies, already shown by Freundlich et al. 2020, but also to a set of clusters of galaxies.