G. Alecian, O. Richard and S. Vauclair (eds)
EAS Publications Series, 17 (2005) 357-360
Diffusion and pulsations in slowly rotating B stars
Physics Dept., Bishop's University, Lennoxville, Qc, Canada, J1M 1Z7
2 GRAAL, Université Montpellier II, cc072, Place Eugène Bataillon, 34095 Montpellier, Cedex 5, France
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 of pulsations in these stars. This result conflicts with observations as cool B stars that show evidence of diffusion, the HgMn stars, are stable to the current detection level. We discuss possible implications of this discrepancy for the models.
© EAS, EDP Sciences, 2005