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Spectral Classification from a Theoretical Point of View
Published online by Cambridge University Press: 12 April 2016
Abstract
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We study the conditions under which a two-dimensional spectral classification according to Teff and ne is possible and when 3- or It-dimensional spectral classification is necessary because the classification criteria are unavoidably influenced by the metal and helium abundances. For late type stars, where molecular absorption becomes important for the continuum a seven-or more- dimensional classification may be necessary. At this point spectral classification may not be useful any more. We find generally that a derivation of the gravitational acceleration from the spectroscopically determined electron density is only possible if the helium abundance is known.
- Type
- VII Theoretically and Empirically Oriented Approach to Spectral Classification
- Information
- International Astronomical Union Colloquium , Volume 47: Spectral Classification of the Future , 1979 , pp. 309 - 326
- Copyright
- Copyright © Vatican Observatory 1979
References
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Stromeren, B. (1963). In Basic Astronomical Data, Strand, K.Aa., ed., The University of Chicago Press: Chicago, p.123.Google Scholar
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