The dark matter remains not at business

 

 

Why galactic curves, on idea, should not be flat (straight lines), it is clearly visible from the following digression:

Considering, that the nucleus draws the everything else in a galaxy:

G*M/R2=V2/R, i.e. V ~ 1/sqrt (R), but in practice V ~ R.

It is possible to explain it by presence of the distributed dark matter with the big mass.

dr.ph.-m.s. Dr.Phimas

 

 

Let I shall show why galactic curve of speed's distribution� should be flat (straight lines).

We count a trajectory of a star practically circular, its speed is V, distance up to the center of galaxy is R.

Let's equate force of an attraction of a star to the center of a galaxy (mass M) and centrifugal force.

G*M/R²=V²/R

 

1. ����� �For central part filled with substance in regular (density ρ)

�=4/3 π ρ R³

whence V ~ R. We receive a flat curve.

2. ����� �Accordingly, for a flat disk or an average part of a galaxy

�=4 π ρ R²

�whence V ~ R^1/2,

If the central part of a galaxy has a small mass then the density of it depends from R (suppose, under the law ρ ~ R^a, a> 0).

Whence for a case 1: V ~ R^(1+�/2) - a return bend of branches,

And for a case 2: V ~ R^(1/2+�/2) - all three opportunities are possible for a <1, a=1, a> 1

�

The dark matter remains not at business.

Any supermassive black hole in the center of a galaxy will not explain a return bend of branches.

- - -

 

Where was the term "a dark matter" from, and why it has appeared?

 

Further just it is clear. When up to the flat universe the luminous substance began to not suffice, they have grasped the idea of a dark matter.

 

It is necessary to make last step.

As the dark matter is not present in enough, and the universe is flat, then ...

 

Email: redshift0@narod.ru

 

The main page ��������Rus

Last correction 06.10.2002 16:30