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2005A&A...433.1031D - Astronomy and Astrophysics, volume 433, 1031-1035 (2005/4-3)
Metallicity of mono- and multiperiodic β Cephei stars.
DASZYNSKA-DASZKIEWICZ J. and NIEMCZURA E.
Abstract (from CDS):
Analyzing IUE ultraviolet spectra of β 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 β 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.
Abstract Copyright: ∼
Journal keyword(s): stars: abundances - stars: variables: general - methods: statistical
Simbad objects: 49
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