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Bump masses and radii of BL Herculis variables

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Abstract

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.

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  1. Copenhagen University Observatory, Øster Voldgade 3, DK-1350, Copenhagen K, Denmark

    Jørgen Otzen Petersen

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  1. Jørgen Otzen Petersen
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Petersen, J.O. Bump masses and radii of BL Herculis variables. Space Sci Rev 27, 495–501 (1980). https://doi.org/10.1007/BF00168341

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