On the Formation of Elliptical Rings in Disk Galaxies
Astrophysics of Galaxies
2015-05-27 v2
Abstract
N-body simulations of galactic collisions are employed to investigate the formation of elliptical rings in disk galaxies. The relative inclination between disk and dwarf galaxies is studied with a fine step of five degrees. It is confirmed that the eccentricity of elliptical ring is linearly proportional to the inclination angle. Deriving from the simulational results, an analytic formula which expresses the eccentricity as a function of time and inclination angle is obtained. This formula shall be useful for the interpretations of the observations of ring systems, and therefore reveals the merging histories of galaxies.
Keywords
Cite
@article{arxiv.1503.04974,
title = {On the Formation of Elliptical Rings in Disk Galaxies},
author = {Yu-Ting Wu and Ing-Guey Jiang},
journal= {arXiv preprint arXiv:1503.04974},
year = {2015}
}
Comments
22 pages, 10 figures, accepted for publication in ApJ