A Contribution to the Spectral Type Theory, IV PDF Download
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Author: Jean Claude Pecker
Publisher:
ISBN:
Category :
Languages : en
Pages : 54
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Book Description
Author: Jean Claude Pecker
Publisher:
ISBN:
Category :
Languages : en
Pages : 54
Get Book Here
Book Description
Author:
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 1402
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Book Description
Author: Jean Claude Pecker
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ISBN:
Category : Stars
Languages : en
Pages : 0
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Author:
Publisher:
ISBN:
Category : Periodicals
Languages : en
Pages : 1178
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Book Description
Author: Jean Claude Pecker
Publisher:
ISBN:
Category : Stars
Languages : en
Pages : 54
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Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 994
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Book Description
Author: United States. National Aeronautics and Space Administration Scientific and Technical Information Division
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 260
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Book Description
Author: United States. Central Intelligence Agency. Foreign Documents Division
Publisher:
ISBN:
Category : Translations
Languages : en
Pages : 948
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Author: United States. National Aeronautics and Space Administration. Scientific and Technical Information Division
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 258
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Book Description
Author: J.E. Beckman
Publisher: Springer Science & Business Media
ISBN: 9400953720
Category : Science
Languages : en
Pages : 452
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Book Description
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.
