Dust grains in a hot gas. II. Astrophysical applications

The results of the work of Burke and Silk on gas-grain cooling and sputtering rates are applied to various astrophysical environments where dust and hot gas may coexist. The effect is studied of swept-up interstellar grains on the evolution of young supernova remnants, and the infrared luminosity is computed as a function of the age of the remnant. We propose an interpretation of far-infrared sources embedded in compact H ii regions or dense clouds, in terms of the supernova phenomenon, with specific application to Carinae. We also reexamine the question of the existence of dust in intergalactic matter in galaxy clusters. Subject headings: galaxies, clusters of - infrared sources interstellar matter - nebulae - supernova remnants