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Post Info TOPIC: V371 Persei
Blobrana


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RE: V371 Persei
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Title: Discovery of the first Super-Lithium rich Beat Cepheid: V371 Per
Authors: V. V. Kovtyukh, N. I. Gorlova, M. Hillen

Four high-resolution spectra of the double-mode Cepheid V371 Per, obtained for the first time, showed the presence of the abnormally strong Li I 6707.76 A line. Our analysis of the light element abundances indicates that the star did not go through the evolutionary dredge-up stage. Large distance from the galactic plane and the low metallicity suggest that V371 Per may belong to the thick disc (or to the halo) of the Galaxy, which is consistent with its low metallicity [Fe/H]=-0.42 and the enhancement of the alpha- and s-elements relative to iron. Line splitting is observed in one of the spectra, which can be due to the non-radial pulsations.

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Blobrana


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Title: V371 Per - A Thick-Disk, Short-Period F/1O Cepheid
Authors: Patrick Wils, Arne A. Henden, Stelios Kleidis, E.G. Schmidt, Doug L. Welch

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 Disk or the Halo, while all other Galactic beat Cepheids belong to the Thin Disk. There are indications from historical data that both the fundamental and first overtone periods have lengthened.

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