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The denser part of the shell in model c just enters the radiative phase since this part has $\log(T_{\rm s}, {\rm K})=5.6$ and the transition temperature for the Sedov blast wave is $\log(T_{\rm s}, {\rm K})=5.8$ (Blondin et al. 1998).

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... medium

Since $\omega_{\rm s}\propto P_{\rm s}$ (Reynolds & Chevalier 1981) and shock velocity $D\propto (\rho^{\rm o}_{\rm s}R^3)^{-1/2}$ in a nonuniform medium (Hnatyk 1988), the variation of energy density $\omega_{\rm s}\propto R^{-3}$ over the surface lies within factors 3 to 9 for models a-c.

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