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Discovery of the first Super-Lithium rich Beat Cepheid: V371 Per

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arxiv 1301.0199 v1 pith:I2NKLFDU submitted 2013-01-02 astro-ph.SR astro-ph.GA

Discovery of the first Super-Lithium rich Beat Cepheid: V371 Per

classification astro-ph.SR astro-ph.GA
keywords v371cepheidfirstlinemetallicityspectraabnormallyabundances
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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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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