Disk dynamics and the X-ray emission of S0 and flat early-type galaxies
Abstract
With 2D hydrodynamical simulations, we study the evolution of the hot gas flows in early-type galaxies, focussing on the effects of galaxy rotation on the thermal and dynamical status of the ISM. The galaxy is modelled as a two-component axisymmetric system (stars and dark matter), with a variable amount of azimuthal velocity dispersion and rotational support; the presence of a counter rotating stellar disk is also considered. It is found that the ISM of the rotationally supported (isotropic) model is more prone to thermal instabilities than the fully velocity dispersion counterpart, while its ISM temperature and X-ray luminosity are lower. The model with counter rotation shows an intermediate behaviour.
Keywords
Cite
@article{arxiv.1302.6725,
title = {Disk dynamics and the X-ray emission of S0 and flat early-type galaxies},
author = {Andrea Negri and Silvia Pellegrini and Luca Ciotti},
journal= {arXiv preprint arXiv:1302.6725},
year = {2013}
}
Comments
2 pages, 2 figures. Proceedings of the International Conference "X-ray Astronomy: towards the next 50 years!", Milan, 1-5 Oct 2012