Table 9: Sample of parameters we used to fit the SEDs of the isolated supergiants. We give their galactic coordinates, their spectral types, the interstellar extinction in magnitudes $A_{\rm i}$ and then the parameters themselves: the extinction in the optical $A_{\rm v}$, the temperature $T_\ast $ and the $\frac{{R}_\ast}{{D}_{\ast}}$ ratio of the star.
Sources l b SpT $A_{\rm i}$ $A_{\rm v}$ $T_{\ast} ({\rm K})$ $\frac{{R}_\ast}{{D}_{\ast}}$
HD 144969 333.18 2.0 B0.5Ia 3.34 3.9 26 000 $4.01 \times10^{-{10}}$
HD 148422 329.92 -5.6 B0.5Ib 0.75 0.9 24 700 $8.76 \times10^{-{11}}$
HD 149038 339.38 2.51 B1Ia 0.81 1 24 000 $5.30 \times10^{-{10}}$
HD 151804 343.62 1.94 O8Iaf 0.83 1.3 32 000 $4.20 \times10^{-{10}}$
HD 152234 343.46 1.22 B0.5Ia 1.17 1.5 25 100 $4.94\times10^{-{10}}$
HD 152235 343.31 1.1 B1Ia 3.37 3.9 24 500 $1.13\times10^{-{9}}$
HD 152249 343.35 1.16 O9Ib 1.34 1.7 30 100 $2.89\times10^{-{10}}$
HD 156201 351.51 1.49 B0.5Ia 2.68 2.9 26 500 $2.90\times10^{-{10}}$


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