Metallicity of mono- and multiperiodic beta Cephei stars

Abstract

Analyzing IUE ultraviolet spectra of beta Cep pulsating stars we have 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.

5 pages, 3 figures, 2 tables

References in corpus (2)

• Asteroseismology of the Beta Cephei star Nu Eridani: photometric observations and pulsational frequency analysis
• Metallicities of the beta Cephei stars from low-resolution ultraviolet spectra

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• Metallicities of the beta Cephei stars from low-resolution ultraviolet spectra
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• Astrophysics in 2005