twin universe astrophysics and cosmology

En résumé (grâce à un LLM libre auto-hébergé)

  • The text presents 2D numerical simulations on galaxy formation.
  • It refers to a pedagogical model using heavy and light balls to simulate gravitational instabilities.
  • Figures show distributions of ordinary matter and dark matter on a 2D sphere.

twin universe astrophysics and cosmology Ghost matter astrophysics. 5 : Results of numerical 2D simulations. VLS. About a possible scheme for galaxy formation. (p8)
5) Some remarks. Didactic model.

With a higher number of mass points, we could have highlighted the formation of clusters and the spongy structure on a 2D sphere. The following images do not correspond to 2D simulations, but are simply hand-drawn. Everyone has seen a football. It is made up of pentagons and hexagons joined together. A suitable choice of parameters could provide such a distribution of clusters and ordinary matter, corresponding to figure 23.

Fig. 23 : The football. ** ** We have twelve pentagons and we suppose they represent twelve ghost matter clusters, organizing the whole system.

**Fig. 23 b: Schematic distribution of matter and ghost matter on a 2D sphere. ** **

Next, the expected distribution.

Fig. 24 : Expected distributions of matter and ghost matter on a 2D sphere.

In a previous paper [14], we presented a didactic model of conjugated gravitational instabilities, using a tank filled with water, a linen, two sets of heavy balls placed on top, and ping-pong balls located below the linen. The heavy balls press on the linen, causing the ping-pong balls to tend to lift it. Imagine that the ping-pong balls form a set of bumps, as shown in figure 25, simulating the clusters of ghost matter. Ordinary matter, small light balls, would be positioned between them.

**** **** Fig. 25 : Didactic image of the system.