VbvAstE-001

Chapter 4
The internal structure of a
star
It was shown above that the state with the constant density is energetically favorable
for a plasma at a very high temperature. The plasma in the central region of a star
can possess by this property . The calculation made below shows that the mass of
central region of a star with the constant density - the star core - is equal to 1/2 of
the full star mass. Its radius is approximately equal to 1/10 of radius of a star, i.e.
the core with high density take approximately 1/1000 part of the full volume of a star.
The other half of a stellar matter is distributed over the region placed above the core.
It has a relatively small density and it could be called as a star atmosphere.
4.1 The plasma equilibrium in the star core
In this case, the equilibrium condition (Eq.(3.3)) for the energetically favorable state
of plasma with the steady density n s = const is achieved at
P = √ Gγ ⋆r, (4.1)
Here the mass density is γ ⋆ ≈ A mpn⋆. The polarized state of the plasma can be
Z
described by a state with an electric charge at the density
and the electric field applied to a cell is
˜ϱ = 1 3 divP = √ Gγ ⋆, (4.2)
Ẽ =
g √
G
. (4.3)
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