twin universe astrophysics and cosmology

Matter ghost matter astrophysics.6. Spiral structure.(p2)

Fig.4 : Schematic representation of a galaxyconfined

in a hole, in the surronding hot ghost matter.

In the figure the border of the hole is abrupt. A more detailed image can be found in reference [22]. See figure 5.

Fig.5 : Schematic representation of a galaxy confined

in a hole, in the surronding hot ghost matter.

Computational result [22].

It looks fairly difficult to deal with such a 3d problem, with today's systems. It would require a huge number of interacting mass-points.

Let us consider the case of a non-realistic galaxy, confined by a ring. In order to build usefull initial conditions we will first bring some theoretical machinnery.