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Baade-Wesselink Radii of Long Period Cepheids New Observational Results

Published online by Cambridge University Press:  12 April 2016

Iain M. Coulson ,
John A. R. Caldwell  and
Wolfgang Gleren
Iain M. Coulson
Affiliation:
South African Astronomical Observatory, P. O. Box 9 Observatory 7935
John A. R. Caldwell
Affiliation:
South African Astronomical Observatory, P. O. Box 9 Observatory 7935
Wolfgang Gleren
Affiliation:
Observatorio Astronomico Universidad Nacional and Physics Department, Universidad de Los Andes, Begota, Colombia

Abstract

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The radii of Galactic Cepheids as determined from a version of the Baade-Wesselink technique are shown to depend upon the colour index used to define the temperature scale. The (V-l) radii are systematically larger than the commonly used (B-V) radii and are probably better estimators of the true radii. There still remains a problem, however, in reconciling the period-radius relation with the period-luminosity-colour relation.

Type
Part I. Fundamental Parameters
Information
International Astronomical Union Colloquium , Volume 82: Cepheids: Theory and Observations , 1985 , pp. 48 - 50
Copyright
Copyright © Cambridge University Press 1985

References

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