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AGB Stars Interferometric Signatures: Effects of Possible Li-rich Spots

Published online by Cambridge University Press:  25 May 2016

Patrick de Laverny  and
Bruno Lopez
Patrick de Laverny
Affiliation:
Observatoire de la Côte d’Azur, Département Fresnel UMR 6528, BP 4229, F- 06304 Nice cedex 4, France
Bruno Lopez
Affiliation:
Observatoire de la Côte d’Azur, Département Fresnel UMR 6528, France

Abstract

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We propose to observe Asymptotic Giant Branch stars (AGB) with spectro-differential interferometric techniques in order to find new observational constraints to inner structure and evolutionary models of these stars. We examine the interferometric signatures created by possible heterogeneities on AGB stars surface due to local Li-enrichments or Li-rich spots and find that such heterogeneities, if they exist, could be detected with present or future interferometers.

Type
6. Stellar Knowledge to and from Light Elements
Information
Symposium - International Astronomical Union , Volume 198: The Light Elements and their Evolution , 2000 , pp. 476 - 477
Copyright
Copyright © Astronomical Society of the Pacific 2000 

References

Abia, C., Pavlenko, Ya., de Laverny, P., 1999, A&A 351, 273 Google Scholar
de Laverny, P., Lopez, B., 2000, in “The changes in abundances in AGB stars”, Mem. S.A. It, in the press.Google Scholar