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

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Spectral Classification and Multicolour Photometry

Part of the book series: International Astronomical Union / Union Astronomique Internationale ((IAUS,volume 50))

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Abstract

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.

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References

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Author information

Authors and Affiliations

  1. Dominion Astrophysical Observatory, Victoria, B.C., Canada

    S. C. Morris & G. Hill

  2. Department of Geophysics, University of British Columbia, Vancouver 8, BC, Canada

    G. A. H. Walker & H. I. B. Thompson

Authors
  1. S. C. Morris
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  2. G. Hill
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  3. G. A. H. Walker
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  4. H. I. B. Thompson
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Editor information

Editors and Affiliations

  1. Observatoire de Haute-Provence, Saint-Michel l’Observatoire, France

    Ch. Fehrenbach

  2. European Southern Observatory, Santiago de Chile, Chile

    B. E. Westerlund

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© 1973 IAU

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Morris, S.C., Hill, G., Walker, G.A.H., Thompson, H.I.B. (1973). Classification of Early Type Stars on the Dominion Astrophysical Observatory Photometric System. In: Fehrenbach, C., Westerlund, B.E. (eds) Spectral Classification and Multicolour Photometry. International Astronomical Union / Union Astronomique Internationale, vol 50. Springer, Dordrecht. https://doi.org/10.1007/978-94-010-2627-7_29

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  • DOI: https://doi.org/10.1007/978-94-010-2627-7_29

  • Publisher Name: Springer, Dordrecht

  • Print ISBN: 978-94-010-2629-1

  • Online ISBN: 978-94-010-2627-7

  • eBook Packages: Springer Book Archive

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