Dynamics of Gas and Dust during Interaction of Diffuse Clouds with a Shock Wave

Abstract

The survival efficiency of dust during the interaction of dusty interstellar clouds with shock wave was studied. We have found that in the adiabatic destruction of small clouds, the dust grains belonging to the cloud are separated by size along the cloud motion: large dust grains remain far behind the gaseous clumps of the cloud, and small grains are entrained by the cloud. In large radiatively cooled clouds, a significant part of dust is contained and saved inside dense cold clumps of the cloud independently of the grain size.