An Atlas of Stellar Spectra

  title={An Atlas of Stellar Spectra},
  author={William Wilson Morgan and Philip Childs Keenan and Edith Kellman},
THIS much-needed atlas defines a two-dimensional classification system of stellar spectra by means of a sequence of standard spectra, many of which are illustrated in the fifty-five photographic prints forming the main body of the work. The spectra were taken specially for the purpose on a small one-prism spectrograph attached to the 40-in. Yerkes refractor. The standard stars chosen, which are mostly brighter than the eighth apparent magnitude, are of types from 05 to M2, and were selected to… 

MK morphological study of Am stars at 66 Å/mm

The pseudo-luminosity effect in the metallic line A-type stars found by Abt & Morgan (1976) is confirmed in a random sample of 27 Am stars. From a morphological study of their spectra in the

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Acquiring data for spectral classification of heavily reddened stars using traditional criteria in the blue-violet region of the spectrum can be prohibitively time consuming using small to medium

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45. Spectral Classifications and Multi-Band Colour Indices

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