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Bump Masses and Radii of BL Herculis Variables

Published online by Cambridge University Press:  12 April 2016

Jørgen Otzen Petersen
Jørgen Otzen Petersen*
Affiliation:
Copenhagen University Observatory, Øster Voldgade 3, DK-1350 Copenhagen K, Denmark

Abstract

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Bump masses and radii are derived for 18 BL Her stars from the observed bump phase and the accurately known fundamental period. The mean mass M/M⊙ = 0.60 ± 0.09 agrees precisely with predictions from standard stellar evolution theory and gives a new test of the theoretical models. The derived radius of V553 Centauri is in good agreement with the radius recently determined by an independent modified Baade-Wesselink method by Balona. Finally, a preliminary discussion of possible continuations of the BL Her bump progression is given.

Type
VII. RR Lyrae and BL Herculis Variables
Information
International Astronomical Union Colloquium , Volume 58: Stellar Hydrodynamics , August 1980 , pp. 495 - 501
Copyright
Copyright © Reidel 1980

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