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The Bonner Spectral Atlas and Three-Dimensional Classification at Low Dispersions

Published online by Cambridge University Press:  14 August 2015

W. C. Seitter*
Affiliation:
Bonn Observatory, Federal Republic of Germany and Smith College, U.S.A.

Abstract

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Work on the third part of the Bonner Spectral Atlas: Peculiar Stars has well progressed during the past year. Observations of the more than 200 stars – photographed with a dispersion of 240 Å mm−1 at Hγ on I-N plates – is nearing completion.

The arrangement of the spectra will be as follows:

  1. 1. WR-stars

  2. 2. O-stars Of sequence

  3. 3. Peculiar B-type stars emission-line objects

  4. 4. Ap-stars with various sequences: Cr-Mn-Hg-rare earths

  5. 5. Asi-stars

  6. 6. Am-stars

  7. 7. Late-type peculiar stars Ba II, CH

  8. 8. C-stars

  9. 9. Late M-type stars

  10. 10. S-stars

  11. 11. Composite spectra

  12. 12. Spectra with large rotational broadening

The 12 groups are displayed on 40 plates, each with 6–8 objects. Stars of groups 8 to 10 will be presented with different exposures in order to facilitate the discovery of faint objects.

Sample plates will be shown and discussed.

Type
Part IV/Abundance Effects in Spectral Classification
Copyright
Copyright © Reidel 1976