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Books > Science & Mathematics > Astronomy, space & time > Galaxies, clusters, intergalactic matter
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Radio Recombination Lines - Proceedings of a Workshop Held in Ottawa, Ontario, Canada, August 24-25, 1979 (Hardcover, 1980 ed.)
Loot Price: R4,324
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Radio Recombination Lines - Proceedings of a Workshop Held in Ottawa, Ontario, Canada, August 24-25, 1979 (Hardcover, 1980 ed.)
Series: Astrophysics and Space Science Library, 80
Expected to ship within 12 - 17 working days
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Since their first detection 15 years ago, radio recombination lines
from several elements have been observed in a wide variety of
objects including HII regions, planetary nebulae, molecular clouds,
the diffuse interstellar medium, and recently, other galaxies. The
observations span almost the entire range from 0.1 to 100 GHz, and
employ both single djsh and aperture synthesis techniques. The
theory of radio recombination lines has also advanced strongly, to
the point where it is perhaps one of the best-understood in astro
physics. In a parallel development, it has become possible over the
last decade to study these same highly-excited atoms in the
laboratory; this work provides further confirmation of the
theoretical framework. However there has been continuing
controversy over the astrophysical interpre tation of radio
recombination line observations, especially regarding the role of
stimulated emission. A workshop was held in Ottawa on 24-25 August,
1979, bringing together many of the active scientists to review the
field and discuss these questions of interpretation. A broad
concensus has emerged: the subtleties of the line-formation process
are understood, and the conditions under which reliable in
formation can easily be extracted from the line measurements are
known. It thus appears likely that the emphasis will shift
increasingly from the study of the line phenomenon itself to
further application in other areas of astrophysics, ranging from
physical processes in plasmas (temperatures, densities, ionization
structure), to the large-scale properties of our galaxy
(abundances, kinematics, structure), and studies of extragalactic
systems."
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