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Discovery of Secular Evolution of the Atmospheric Abundances of Ap Stars

Published online by Cambridge University Press:  23 January 2015

J. D. Bailey ,
J. D. Landstreet  and
S. Bagnulo
J. D. Bailey
Affiliation:
Max Planck Institut für extraterrestrische Physik, Giessenbachstrasse 1, 85748 Garching, Germany email: [email protected]
J. D. Landstreet
Affiliation:
Department of Physics and Astronomy, The University of Western Ontario, London, Ontario, N6A 3K7, Canada Armagh Observatory, College Hill, Armagh, BT61 9DG, Northern Ireland, UK
S. Bagnulo
Affiliation:
Armagh Observatory, College Hill, Armagh, BT61 9DG, Northern Ireland, UK
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Abstract

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The stars of the middle main-sequence have relatively quiescent outer layers, and unusual chemical abundance patterns may develop in their atmospheres, revealing the action of such subsurface phenomena as gravitational settling and radiatively driven levitation of trace elements, and their competition with mixing processes such as turbulent diffusion. We report the discovery of the time evolution of such chemical tracers through the main-sequence lifetime of magnetic chemically peculiar stars.

Keywords

stars: abundancesstars: chemically peculiarstars: magnetic fields
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 9 , Issue S307: New windows on massive stars: asteroseismology, interferometry, and spectropolarimetry , June 2014 , pp. 365 - 366
Copyright
Copyright © International Astronomical Union 2015 

References

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