Encounters between spherical galaxies II: systems with dark halo
Abstract
We performe N-body simulations of encounters between spherical systems surrounded by a spherical halo. Following a preceding paper with a similar aim, the initial systems include a spherical Jaffe model for the luminous matter and a Hernquist model for the halo. The merger remnants from this sample are mainly slowly rotating, prolate spheroids with a radially anisotropic velocity distribution. The results are compared with real-life ellipticals and with the models without halo in paper I. We argue that elliptical galaxies with evidence of dark matter could be formed in the field via a merger of spheroids surrounded by a dark matter halo, while ellipticals with no evidence of dark matter might be formed via a merger of two spheroids in a cluster.
Cite
@article{arxiv.astro-ph/0506015,
title = {Encounters between spherical galaxies II: systems with dark halo},
author = {A. C. Gonzalez-Garcia and T. S. van Albada},
journal= {arXiv preprint arXiv:astro-ph/0506015},
year = {2011}
}
Comments
12 pages, 15 figures, accepted for publication in MNRAS. High res. version avaible at http://www.iac.es/folleto/research/Publi02/preprints05.htm