The Double-Mode Cepheid V371 Persei Redux

A metallicity of[Fe/H] = -0.05 [ Fe / H ] = - 0.05 to-0.40 - 0.40 was derived from four spectra of the peculiar beat Cepheid V371 Per. This conflicts with previous estimates ranging from-0.7 - 0.7 to-1.0 - 1.0 based on the period ratio. It is suggested that the discrepancy may be resolved by assumin...

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Bibliographic Details
Published in:Publications of the Astronomical Society of the Pacific 2011-04, Vol.123 (902), p.381-383, Article 381
Main Author: Schmidt, E. G.
Format: Article
Language:English
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Summary:A metallicity of[Fe/H] = -0.05 [ Fe / H ] = - 0.05 to-0.40 - 0.40 was derived from four spectra of the peculiar beat Cepheid V371 Per. This conflicts with previous estimates ranging from-0.7 - 0.7 to-1.0 - 1.0 based on the period ratio. It is suggested that the discrepancy may be resolved by assuming near solar metallicity but a low mass. This is in accord with a suggestion by Sandage and Tammann that the AHB3 (or BL Her) stars are Population I analogs of short-period type II Cepheids. Further pulsational modeling is needed to clarify the status of this star and to understand the AHB3 stars.
ISSN:0004-6280
1538-3873
1538-3873
DOI:10.1086/659148