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The Light Elements in the Light of 3D Hydrodynamical Model Atmospheres

Published online by Cambridge University Press:  25 May 2016

Martin Asplund
Martin Asplund*
Affiliation:
Uppsala Astronomiska Observatorium, Box 515, SE-751 20 Uppsala, Sweden

Abstract

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The influence of stellar granulation on the line formation of the light elements in metal-poor stars has been investigated by means of 3D hydrodynamical model atmospheres. Due to a lucky (?) coincidence, the effects due to the lower photospheric temperatures with 3D models compared with classical 1D model atmospheres are almost exactly balanced by a pronounced over-ionization of Li i, as concluded from detailed 3D NLTE calculations. Additionally, the effects of convective line asymmetries on 6Li isotope determinations have been investigated and found to be of minor importance.

Type
6. Stellar Knowledge to and from Light Elements
Information
Symposium - International Astronomical Union , Volume 198: The Light Elements and their Evolution , 2000 , pp. 448 - 453
Copyright
Copyright © Astronomical Society of the Pacific 2000 

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