The role of dark matter halo in the evolution of the non-stationary disk of spiral galaxies

TL;DR

This study investigates how dark matter halos influence the evolution and stability of galactic disks, revealing that halos stabilize in-plane oscillations but destabilize vertical ones, with structure heavily dependent on halo properties.

Contribution

It provides a numerical analysis of the impact of dark matter halo parameters on the non-linear oscillations and stability of galactic disks, highlighting their dual stabilizing and destabilizing effects.

Findings

Dark matter halos stabilize in-plane disk instabilities.

Halos destabilize vertical oscillations of the disk.

Disk structure depends strongly on halo mass and shape.

Abstract

In this paper, we consider the problem of the evolution of the disk subsystem of galaxies in view of the halo. To this end, we have studied the dependence of the evolution of a non-linearly non-radially disk oscillating in its plane depending on the basic parameters of the dark matter halo numerically. The dark matter halo stabilizes the instabilities in the plane of the disk, but destabilizes its vertical oscillations. The global disk structure is dependent strongly on the mass and shape of the of dark matter halo. The evolutionary dependence of the oscillation process of a self-gravitating disk versus the indicated parameters of the dark matter halo are constructed.