Nitrogen excess in slowly-rotating beta Cephei stars: deep mixing or diffusion?
SourceCommunications in Asteroseismology, 150, (2007), pp. 199-200
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Communications in Asteroseismology
We present the results of an NLTE abundance study of a small sample of beta Cephei stars, which point to the existence of a population of slowly-rotating B-type pulsators exhibiting a significant amount of nitrogen-enriched material at their surface. Although the origin of this nitrogen excess remains unclear, an overabundance preferentially occurring in stars with a detected magnetic field seems to emerge at this stage. Full details can be found in Morel et al. (2006).
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