Dark matter in galaxies, its abundance, and its distribution remain a subject of long-standing
discussion, especially in view of the fact that neither dark matter particles nor dark matter …

Вопрос о тёмной материи в галактиках, её количестве и распределении долгие годы
остаётся дискуссионным, особенно если учесть, что тела или частицы, образующие …

The apparent shapes of spiral galaxies in the Two Micron All Sky Survey Large Galaxy Atlas
are used to constrain the intrinsic shapes of their disks. When the distribution of apparent …

We investigate the stability properties of trajectories in barred galaxies with mildly triaxial
halos by means of Liapunov exponents. This method is perfectly suitable for time-dependent …

Using N-body simulations (N∼ 106–107), we examine how a non-axisymmetric dark halo
affects the dynamical evolution of the structure in collisionless (stellar) discs. We …

We have studied different geometry of the galaxy and the influence of certain geometry on
the possible derivation of non-linear equation. We discussed soliton solutions of the derived …

The time evolution of barred structures is examined under the influence of the external
forces exerted by a spherical halo and by prolate halos. In particular, galaxy disks are …

Aims. The predictability of a system indicates how often a computed orbit is close to a real
orbit of the system, independent of its stability or chaotic nature. We explore the effect of dark …

In contrast to the case of most other topics treated in this volume, it is not clear whether
galactic gas dynamics can be discussed in terms of standard hydrodynamics. Nevertheless …

We use particle simulations to study the motion of gas in galaxy models with mildly non-
axisymmetric dark matter haloes with nearly constant density cores. In particular the effect of …