Radio Recombination Lines: Proceedings of a Workshop Held in by M. J. Seaton (auth.), P. A. Shaver (eds.)

By M. J. Seaton (auth.), P. A. Shaver (eds.)

Since their first detection 15 years in the past, radio recombination traces from numerous components were saw in a wide selection of items together with HII areas, planetary nebulae, molecular clouds, the diffuse interstellar medium, and lately, different galaxies. The observations span nearly the whole variety from 0.1 to a hundred GHz, and hire either unmarried­ djsh and aperture synthesis innovations. the speculation of radio recombination strains has additionally complex strongly, to the purpose the place it's maybe one of many best-understood in astro­ physics. In a parallel improvement, it has develop into attainable during the last decade to check those related highly-excited atoms within the laboratory; this paintings offers extra affirmation of the theoretical framework. even if there was carrying on with controversy over the astrophysical interpre­ tation of radio recombination line observations, specially in regards to the position of inspired emission. A workshop used to be held in Ottawa on 24-25 August, 1979, bringing jointly a few of the lively scientists to check the sphere and talk about those questions of interpretation. A vast concensus has emerged: the subtleties of the line-formation approach are understood, and the stipulations lower than which trustworthy in­ formation can simply be extracted from the road measurements are identified. It hence seems most probably that the emphasis will shift more and more from the learn of the road phenomenon itself to additional software in different components of astrophysics, starting from actual approaches in plasmas (temperatures, densities, ionization structure), to the large-scale houses of our galaxy (abundances, kinematics, structure), and reports of extragalactic systems.

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21, p. 669. : 1978, Mon. Not. R. Astr. Soc. 185, p. 5P. : 1979, Mon. Not. R. Astr. Soc. 187, p. 785. : 1897, Phil. Mag. 44, p. 293. LABORATORY STUDIES OF RYDBERG ATOMS Daniel Kleppner Department of Physics and Research Laboratory of Electronics Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 Time and again the world of atomic physics has been illuminated and stimulated by astrophysical discoveries, and though it may be an exaggeration to claim that the field of Rydberg atom research sprang from the discovery of recombination radiation in 1965, there is no doubt that my own involvement started from that point.

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