Absorption and Emission Characteristics of Interstellar Dust

摘要: Molecular transitions which occur in the middle infrared region of spectrum correspond with characteristic frequencies molecular vibrations. Thus, moderate resolution spectroscopy interstellar medium offers unique evidence about molecules condensed and gaseous phases their distribution. It is purpose this paper to discuss spectral properties phase. However, astrophysical literature, it difficult find a qualitative description effects solid state has on vibrations, since these largely determine spectroscopic dust, discussion will begin general then be directed toward describing optical characteristics ice component dust. The dust stressed, rather than those expected from more homogeneous components such as silicates, graphite, or amorphous carbon have been discussed considerable detail elsewhere (e.g. Kratschmer Huffman, 1979, Knacke Kratschmer, 1980, Day, Borghesi et al., 1983 references therein)