The real part of the sub-spectrum of the MHD continua of a cool solar prominence equilibrium with strong gravity (g = 1.000) as a function of the radial flux coordinate are shown for axial wavenumber k =  −1 and poloidal mode numbers m =  {  − 2,...,4 } . Here, the temperature is assumed to be a flux function. The crosses are the PHOENIX results, while the colored lines are the results of the four-mode coupling scheme. The color red, green, blue, and yellow correspond to the dominant , , , and components of the eigenvector.