Effect of enhanced sublimation from an active region of a cometary nucleus

Abstract

Preliminary results of calculation of the effect of amplification of sublimation due to concentration of the solar radiation by a conical hole in the surface dust layer on a cometary nucleus are given. The temperature of ice on the bottom of the crater is calculated for different geometrical parameters of the crater. The dependence of the effect of intensification of sublimation on the geometrical parameters is considered for a specific case when a single active region is exactly on the pole of the nucleus and this pole is directed to the Sun.