Final composition of the compact structure, comparing two simplifications of determining the luminosity and an illustration of the difference in luminosities at the start of the evolution. The solid line shows the composition with the luminosity scaling linearly with the mass, whereas the dashed line shows the composition with luminosity scaling as $\mathrm{T}\frac{\mathrm{d}S}{\mathrm{d}t}$ with the mass, where $\frac{\mathrm{d}S}{\mathrm{d}t}$ is taken to be constant.