Condition of predominance of electrostatic forces over gravitational forces in space plasma

The free energy of the cosmic plasma formed by stars, protons, and electrons is calculated. The free energy includes electrostatic correction to the energy of ideal gas of particles. It is shown that the derivative of the free energy over the interstellar distance in a certain range of distances has a positive sign. That is, there is a force in the plasma tending to reduce the distance between stars (the force of electrostatic compression of the plasma). The origin of this force is related to the correlation of electrons in the electric fields of protons and the corresponding gain of electrostatic energy during compression. It is shown that the electrostatic forces of plasma compression become stronger than the gravitational forces of interstellar attraction at stellar masses equal to the Sun's mass when the charge of stars is higher than 1033 (in units of elementary charge). The findings may be useful in elucidating the nature of dark matter in space.