EDP Sciences
Free Access
Volume 433, Number 3, April III 2005
Page(s) 1031 - 1035
Section Stellar structure and evolution
DOI https://doi.org/10.1051/0004-6361:20040397
Published online 29 March 2005

A&A 433, 1031-1035 (2005)
DOI: 10.1051/0004-6361:20040397

Metallicity of mono- and multiperiodic $\mathsf{\beta}$ Cephei stars

J. Daszynska-Daszkiewicz and E. Niemczura

Astronomical Institute of Wroclaw University, ul. Kopernika 11, 51-622 Wroclaw, Poland
    e-mail: daszynska@astro.uni.wroc.pl

(Received 5 March 2004 / Accepted 2 December 2004)

Analyzing IUE ultraviolet spectra of $\beta$ Cep pulsating stars we noticed that multiperiodic variables have a larger mean metal abundance in the photosphere, [ m/H] , than monoperiodic ones. We apply statistical tests to verify this dichotomy. We obtain that, with a large probability, the multiperiodic $\beta$ Cep stars have greater values of [ m/H] . This result is consistent with the linear non-adiabatic theory of pulsation of early B-type stars.

Key words: stars: abundances -- stars: variables: general -- methods: statistical

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© ESO 2005

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