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Classification of Early Type Stars on the Dominion Astrophysical Observatory Photometric System

Published online by Cambridge University Press:  14 August 2015

S. C. Morris ,
G. Hill ,
G. A. H. Walker  and
H. I. B. Thompson
S. C. Morris
Affiliation:
Dominion Astrophysical Observatory, Victoria, B.C., Canada
G. Hill
Affiliation:
Dominion Astrophysical Observatory, Victoria, B.C., Canada
G. A. H. Walker
Affiliation:
Department of Geophysics, University of British Columbia, Vancouver 8, B.C., Canada
H. I. B. Thompson
Affiliation:
Department of Geophysics, University of British Columbia, Vancouver 8, B.C., Canada

Abstract

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A classification method has been developed for early–type stars observed on the Dominion Astrophysical Observatory photometric system. Two reddening-independent parameters, Q(35) and Q(38), are used. Q(35) is a measure of the Balmer discontinuity, while Q(38) is a measure of the strength of the upper members of the Balmer series. A preliminary calibration of Q(35) and Q(38) in terms of spectral types and luminosity classes is given, and applications to several groups of stars are shown.

Type
Part III: Photometric Classification
Information
Symposium - International Astronomical Union , Volume 50: Spectral Classification and Multicolour Photometry , 1973 , pp. 152 - 161
Copyright
Copyright © Reidel 1973 

References

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