The Persistence of Warps in Spiral Galaxies with Massive Halos
Abstract
We study the persistence of warps in galactic discs in the presence of massive halos. A disc is approximated by a set of massive rings, while a halo is represented by a conventional n-body simulation. We confirm the conclusion of Nelson & Tremaine (1995) that a halo responds strongly to an embedded precessing disc. This response invalidates the approximations made by in the derivation of classical `modified tilt' modes. We show that the response of the halo causes the line of nodes of a disc that starts from a modified tilt mode to wind up within a few dynamical times. We explain this finding in terms of the probable spectrum of true normal modes of a combined disc-halo system.
Keywords
Cite
@article{arxiv.astro-ph/9708024,
title = {The Persistence of Warps in Spiral Galaxies with Massive Halos},
author = {James Binney and Ing-Guey Jiang and Suvendra Dutta},
journal= {arXiv preprint arXiv:astro-ph/9708024},
year = {2009}
}
Comments
8 pages, 6 figures, 1 table, submitted to monthly notice on July 23, 1997