We review the wide range of astrophysical observations of gamma ray emission lines and we discuss their implications. We consider line emission from solar flares, the Orion molecular cloud complex, supernovae 1987A and 1991T, the supernova remnants Cas A and Vela, the interstellar medium, the Galactic center region and several Galactic black hole candidates. The observations have important, and often unique, implications on particle acceleration, star formation, processes of nucleosynthesis, Galactic evolution and compact object physics.
The Analysis of Emission Lines: A Meeting in Honor of the 70th Birthdays of D. E. Osterbrock & M. J. Seaton
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- Plain TEX file, 28 pages with 14 figures available upon e-mail request to firstname.lastname@example.org. In press, 1995, in The Analysis of Emission Lines, eds. R. E. Williams and M. Livio, (Cambridge: Cambridge Univ. Press), based on an invited talk at the Analysis of Emission Lines Conference, Space Telescope Science Institute, May 1994.