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Diffusion and pulsations in slowly rotating B stars

Published online by Cambridge University Press:  13 January 2006

G. Alecian ,
O. Richard ,
S. Vauclair ,
S. Turcotte  and
O. Richard
S. Turcotte
Affiliation:
Physics Dept., Bishop's University, Lennoxville, Qc, Canada, J1M 1Z7
O. Richard
Affiliation:
GRAAL, Université Montpellier II, cc072, Place Eugène Bataillon, 34095 Montpellier, Cedex 5, France
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Abstract

Diffusion in cool B stars of the main sequence has been shown to strongly affect opacities and convection in cool B stars of the main sequence. We show here that diffusion in B stars maintains or enhances the excitation ofpulsations in these stars. This result conflicts with observations as cool B starsthat show evidence of diffusion, the HgMn stars, are stable to the currentdetection level. We discuss possible implications of this discrepancy for the models.

Type
Research Article
Information
European Astronomical Society Publications Series , Volume 17: Element Stratification in Stars: 40 Years of Atomic Diffusion , 2005 , pp. 357 - 360
Copyright
© EAS, EDP Sciences, 2005

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