Abstract
The extant beat and bump Cepheid mass discrepancy problems are reexamined with the new opacities of Iglesias and Rogers. Compared to calculations with the Los Alamos opacities, the period ratios P 1 /P 0 and P 2 /P 0 (1) are strongly reduced for any fixed stellar parameters (L, M, T eff , X, Z) and (2) exhibit a novel, large sensitivity to luminosity and to metallicity. For the beat Cepheids the P 1 /P 0 period ratios now yield masses between 4 and 7 M ⊙ , in agreement with the other mass determinations
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