STAR COLLAPSING GRAPHICS
[version espaņola]

We'll draw a space-time graphic representing a collapsing star.

As we could not represent 3 spacial dimension and another,the time, in a paper, we will only draw one of the spacial dimensions and the time dimesion. Thus we will only represent the x axis and the time, locating the origin of coordinates in the center of the star and crossing the x axis the whole star.

In this way, we have that a stable star will be represented like in the graph on the left, simply existing the star in the same situation along the time. I in this graph have put the external layers of the star in clearer color and the inner layers in darkest colors.

The light beams, emitted by the star, travel slower in the star neighborhoods (for the gravity effects on time and space) and after move with greater speed as they move away from the star, approaching to the well-known speed of the light in the void. Then, the representation of ligth is a curve in the s-t graphic because it accelerate with the time.

The classical representation of a collapsing star, with a diagram like this, is the following:

Here we have that she star collapses toward the center until being a mere point and occupy a space zero.

The behavior of light beam becomes peculiar. The light beams that are emitted in the event horizon stay in this place (they don't move in x) while the time continues elapsing, and for this reason its representation is the red vertical line. The light beams emitted inside the event horizon also collapse toward the center of the black hole because the deformation of the space-time causes that this were the only possible way inside the hole.

But if we keep in mind the hypothesis that the slowing of the time also slow the collapse, and in the event horizon stopping the time it will also stop the collapse, we have that the graph should be:

According to this supposition the collapse is braked and the mass compact toward a densities distribution so that the whole star could be considered an event horizon. In fact this state will never be reached since the time tends to stop as the space-time is deformed, so that the matter that collapse tend to travel more slow until advance nothing of space, not even toward the center of the star.

The collapse until the balance situation thus would take an infinite time, and then the graph is asintoticaly toward this position of balance.

Here a light beam emitted by the star "almost frozen" would take a time "almost infinite" in leaving from there and arrive to an external observer.

The black hole, in fact, would not be formed never, but rather it would be the asintotical tendency of the stellar collapse, and of course it would not be collapsed toward a point. It would be a black hole in eternal formation.

[black holes index]

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