Bump masses and radii of BL Herculis variables |
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Authors: | Jørgen Otzen Petersen |
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Affiliation: | (1) Copenhagen University Observatory, Øster Voldgade 3, DK-1350 Copenhagen K, Denmark |
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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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