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Books > Science & Mathematics > Physics > Applied physics & special topics > Astrophysics
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Progress in Stellar Spectral Line Formation Theory (Paperback, Softcover reprint of the original 1st ed. 1985)
Loot Price: R1,454
Discovery Miles 14 540
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Progress in Stellar Spectral Line Formation Theory (Paperback, Softcover reprint of the original 1st ed. 1985)
Series: NATO Science Series C, 152
Expected to ship within 18 - 22 working days
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Spectral line formation theory is at the heart of astrophysical
diagnostic. Our knowledge of abundances, in both stellar and
interstellar contexts, comes almost enti rely from line analysis,
as does a major fraction of our ability to model stellar
atmospheres. As new facets of the universe become observable so the
techniques of high reso lution spectroscopy are brought to bear,
with great reward. Improved instruments, such as echelle
spectrographs, employ ing detectors of high quantum efficiency,
have revolutioned our ability to observe high quality line
profiles, although until now this ability has been confined to the
brightest stars. Fabry-Perot interferometers and their modern
deriva tives are bringing new ranges of resolving power to studies
of atomic and ionic interstellar lines, and of course radio
techniques imply exceedingly high resolution for the cool
interstellar medium of molecules and radicals. Telescopes in space
are extending the spectral range of these types of observations.
Already the Copernicus and IUE high resolution spectrographs have
given us a tantalizing glimmer of what it will be like to obtain
ultraviolet spectra with resolution and signal to noise ratio
approaching those obtainable on the ground. Fairly soon Space
Telescope will be producing high resolution spectroscopic data of
unparal leled quali ty and distance range. As often happens in
astro physics the challenge is now coming from the observers to the
theorists to provide interpretational tools which are adequate to
the state of the data."
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