Why the Temperature Rise does not Occur in Radiative Equilibrium in Stellar Chromospheres of Dominant H^{-} Opacity

It is demonstrated that the temperature inversion in the low solar chromosphere is very unlikely to result from the influence of the photospheric radiation field on the low-density gas Therefore, dissipation of mechanical energy is necessary to produce the rise. Since this effect follows directly from the dominance of the continuum opacity by the H ion, the same conclusion follows for all stellar chromospheres where H- dominates the continuum opacity