MASS INJECTION RATES DUE TO SUPERNOVAE AND CLOUD EVAPORATION IN STARBURST SUPERWINDS

We show that, for reasonable assumptions, conductively driven and abla tion-driven evaporation of clouds in the core of the starburst galaxy M82 lead to a rate of mass injection into the superwind that is severa l times greater than that due to supernovae. This is in harmony with t he results of efforts to construct a global superwind model consistent with the X-ray emission of M82. We examine the possibility that the i ncrease of pressure in a starburst causes the burst to develop by indu cing gravitational instability of the clouds.