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The Problem of Spectral Classification of Stars in the Sequence S-SC-C

Published online by Cambridge University Press:  12 April 2016

Patricia C. Boeshaar  and
Philip C. Keenan
Patricia C. Boeshaar
Affiliation:
University of Oregon
Philip C. Keenan
Affiliation:
Perkins Observatory, Ohio State and Ohio Wesleyan Universities

Abstract

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The sequence of stars starting with type S and extending through the SC stars into the red carbon stars are brought into the following revised system of classification:

In this table X stands for the temperature type and the number to the right of the slant line is an abundance index which, as suggested by Ake (1978), is essentially a measure of C/O. Intensities of ZrO and TiO are given also.

Type
II Criteria and Applications of MK Classification
Information
International Astronomical Union Colloquium , Volume 47: Spectral Classification of the Future , 1979 , pp. 39 - 50
Copyright
Copyright © Vatican Observatory 1979

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