Upperpanel: color map of the temperature distribution in the very inner part (up to 5 stellar equatorial radii) of the dense circumstellar outflowing disk of a (near) critically rotating star with the same parameters as in Fig. 4. The region of significantly increased temperature near the disk midplane is generated by the viscous heating. The contours mark the temperature levels 5000 K, 10 000 K, 20 000 K, 50 000 K and 80 000 K. Lower panel: as in the upper panel, in theinner part up to 20 stellar equatorial radii. The strip of highly increased temperature near the disk midplane is generated by the viscous heating. The contours mark the temperature levels 3000 K, 10 000 K and 50 000 K.