Abstract
The systems of spectral classification that are described here have been developed for use with spectra which have a linear dispersion of at least 120 Å/mm at Hγ. Other systems of spectral classification have been developed for use with spectra of very low dispersion, generally objective prism spectra, the purpose being to further our understanding of galactic structure and of the distribution of the stars. They are reviewed, for instance, by Fehrenbach (1958).
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© 1966 D. Reidel Publishing Company
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Underhill, A.B. (1966). Improved Systems of Spectral Classification. In: The Early Type Stars. Astrophysics and Space Science Library, vol 6. Springer, Dordrecht. https://doi.org/10.1007/978-94-010-3556-9_2
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DOI: https://doi.org/10.1007/978-94-010-3556-9_2
Publisher Name: Springer, Dordrecht
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