Multi-phase Hydrodynamics and X-ray Clusters Formation
Abstract
We investigate the role of radiative cooling within the core of large X-ray clusters using multi-phase hydrodynamics. We developed for that purpose a spherically symmetric hydrodynamical code, coupled to a "fluid model" that describes accurately the dark matter component. Cooling is included using a self-consistent multi-phase approach, leading to "cooled gas" mass deposition throughout the flow. We simulate the collapse and the subsequent evolution of a Coma-like X-ray cluster, avoiding the well-known "cooling catastrophe". The total mass profile of our simulated cluster is very similar to the "universal" profile proposed by Navarro, Frenk & White (1995). More interestingly, we also obtain a quasi-isothermal temperature profile, which is a direct consequence of multi-phase cooling within such a potential well.
Cite
@article{arxiv.astro-ph/9710010,
title = {Multi-phase Hydrodynamics and X-ray Clusters Formation},
author = {Romain Teyssier and Jean-Pierre CHIEZE and Jean-Michel Alimi},
journal= {arXiv preprint arXiv:astro-ph/9710010},
year = {2007}
}
Comments
4 pages, 1 figures, LaTex2e (sproc.sty). To appear in the proceedings of the conference "A New Vision of an Old Cluster: Untangling Coma Berenices", eds. F. Durret et al., held in Marseille, France 17-20 June 1997