Titlebook: Diffuse Matter in Galaxies; Cargèse 1982 J. Audouze,J. Lequeux,A. Vidal-Madjar Book 1983 D. Reidel Publishing Company, Dordrecht, Holland 1

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https://doi.org/10.1007/978-3-642-95768-0 large that these explosions provide the dominant energy for the heating of the hot (T ? 10. K) IS component and for the kinetic energy of the large scale motions of the interstellar clouds. In addition, the ejected matter of supernovae is the main source of the chemical pollution of the IS medium.

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Brett A. Neilan,Shauna Murray,Min Chent elements in the universe. For both elements the different observational methods used in the interstellar medium are mentioned and the most precise ones described in more details. A discussion of the results in comparison with current theories shows that many more observations are needed. Typical f

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William N. Valentine,Donald E. Pagliato charge transfer reactions, dielectronic recombination, and to photoionisation and radiative recombination. Collisional excitation of fine structure transitions by electrons and hydrogen atoms is also considered in relation to the cooling of the interstellar gas.

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Optical and IR Emission Lines,To discuss the present understanding of optical and IR emission lines in the interstellar medium, we summarize the basic theory involved, and next see the status of observations and the approximations used to derive the physical parameters.