Rotation curves velocities obtained by warm low-density plasma simulating dark halos and dark matter
The free electron model with Boltzmann statistics for spherical low-density plasmas is developed further with asymptotic relations obtaining the density of electrons, mass densities, and the potentials of such plasmas. Solutions are developed as function of a pure number proportional to the distance from the stellar plasma center (galaxy center) with extremely small coefficient, so that these solutions are essentially functions of large astronomical distances and masses. The present plasma is divided into a central part and very long tail, where the central part of the plasma shows an exponential dependence on the distance from the galaxy center, but a part of the large mass of this plasma is included in the long stellar plasma tail. The present model is specialized to completely ionized Hydrogen plasma (with a small correction factor considering its mixture with heavier atoms) where emission and absorption of spectral lines can be neglected in the warm low density stellar plasma. We apply the present approach for treating rotation curves measurements, A general theory for rotation curves should include the superposition of the gravitational potentials introduced by the high-density compact stars, with those of the low-density stellar plasma potentials. But for halos which are at extremely large distance from the galaxy center, the dominant effects would be those of dark matter, and such dark halos are permeating and surrounding the compact galactic stars. Such plasma is found to be transparent in most of the EM spectrum. The existence of a large mass for the warm low-density plasma may solve the problem of missing mass in rotation curves measurements.