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Radio Recombination Lines: 25 Years of Investigation - Proceeding of the 125th Colloquium of the International Astronomical Union, Held in Puschino, U.S.S.R., September 11-16, 1989 (Paperback, Softcover reprint of the original 1st ed. 1990)
Loot Price: R1,564
Discovery Miles 15 640
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Radio Recombination Lines: 25 Years of Investigation - Proceeding of the 125th Colloquium of the International Astronomical Union, Held in Puschino, U.S.S.R., September 11-16, 1989 (Paperback, Softcover reprint of the original 1st ed. 1990)
Series: Astrophysics and Space Science Library, 163
Expected to ship within 10 - 15 working days
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Text no 1 Radio Recombination Lines (RRLs), discovered in the USSR
in 1964, have become a powerful research tool for astronomers.
Available throughout the radio spectrum, these lines carry
information regarding the density, temperature, turbulence and
velocity of thermal plasmas. Their very existance shows the
presence of thermal gas. They also can carry information regarding
magnetic fields if Zeeman splitting were to be detected. Containing
the proceedings of an IAU Colloquium celebrating the 25th
anniversary of their detection, this volume tells us what has
happened since. It contains the story of the detection of RRLs and
reviews of many areas of physics of the interstellargas from which
stars form, HII regions excited by newly formed stars, planetary
nebulae involving dying stars, and the structure of our Milky Way
and other galaxies reflecting the large-scale morphology of the
star formation process. In addition there is an article describing
modern laboratory studies of Rydberg atoms to probe the basic
physics of atomic structure, and articles describing the theory of
collisions and radiation upon Rydberg atoms leading to observate
effects to be used as diagnostic tools in astromony. This book
focuses on the 25 years of astronomical research with radio
recombination lines (RRLs) since their discovery in 1965. It covers
a wide range of topics: papers dealing with research into Rydberg
atoms both in the laboratory and in the interstellar medium of our
galaxy and others; papers on the interaction of radiation and
atomic systems, as well as with the effects of inadiabatic
collisions between these atoms and both ions and electrons. It
deals with astronomical observations of atoms with `diameters'
ranging from 0.08 to 50 mum a size factor of 625. It deals with
RRLs in absorption, in emission and as true masers. And it deals
with plasmas with temperatures ranging from 10 to greater than 104
kelvins, and with an even greater range of volume densities. Much
new work is reported, including low frequency RRLs discovered in
1980 and the maser RRLs from the star MWC349, discovered in 1989.
The advent of aperture synthesis telescopes and large
single-element telescopes have made possible RRL studies with high
angular resolution. The sum total of the work reported here will
make the volume a platform from which to search new horizons in RRL
research.
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