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On the Precision of the MK Spectral Classification System

Published online by Cambridge University Press:  14 August 2015

C. Jaschek  and
M. Jaschek
C. Jaschek
Affiliation:
Observatorio Astronómico, La Plata, Argentina
M. Jaschek
Affiliation:
Observatorio Astronómico, La Plata, Argentina

Abstract

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It is shown that a large scatter exists in all color-color and color-spectral type diagrams. This scatter can not be neglected and its importance is shown in several examples. A new approach is then developed for the study of the precision attainable in spectral classification. It is found that for A-type stars MK classification is about as accurate as photometry, whereas for B-type dwarfs photometry is at least two times more precise than MK classification. A precision of ±0.6 tenths of a spectral class seems attainable in both groups.

Type
Part I: Classification of Slit Spectra
Information
Symposium - International Astronomical Union , Volume 50: Spectral Classification and Multicolour Photometry , 1973 , pp. 43 - 51
Copyright
Copyright © Reidel 1973 

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