Metallicity of mono- and multiperiodic beta Cephei stars

Details Metallicity of mono- and multiperiodic beta Cephei stars Metallicity of mono- and multiperiodic beta Cephei stars

2004-10-19

arxiv.org/abs/astro-ph/0410442v1

Astronomy and Astrophysics

Astrophysics

5 pages, 3 figures, 2 tables

Scientific paper

10.1051/0004-6361:20040397

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.

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