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.
