V371 Per – A thick-disc, short-period F/1O Cepheid

V371 Per was found to be a double-mode Cepheid with a fundamental mode period of 1.738 days, the shortest among Galactic beat Cepheids, and an unusually high period ratio of 0.731, while the other Galactic beat Cepheids have period ratios between 0.697 and 0.713. The latter suggests that the star ha...

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Bibliographic Details
Published in:Monthly notices of the Royal Astronomical Society 2010-02, Vol.402 (2), p.1156-1160
Main Authors: Wils, P., Henden, A. A., Kleidis, S., Schmidt, E. G., Welch, D. L.
Format: Article
Language:English
Subjects:
Astronomy
Astrophysics
Cepheids
Double stars
Earth, ocean, space
Exact sciences and technology
Metals
Ratios
stars: individual: V371 Per
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Summary:V371 Per was found to be a double-mode Cepheid with a fundamental mode period of 1.738 days, the shortest among Galactic beat Cepheids, and an unusually high period ratio of 0.731, while the other Galactic beat Cepheids have period ratios between 0.697 and 0.713. The latter suggests that the star has a metallicity [Fe/H] between −1 and −0.7. The derived distance from the Galactic plane places it in the thick disc or the Halo, while all other Galactic beat Cepheids belong to the thin disc. There are indications from historical data that both the fundamental and first overtone periods have lengthened.
ISSN:0035-8711
1365-2966
DOI:10.1111/j.1365-2966.2009.15941.x