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Technetium in Stellar Atmospheres

Published online by Cambridge University Press:  19 July 2016

Tônu Kipper
Tônu Kipper*
Affiliation:
Tartu Astrophysical Observatory, 202444, Tôravere, Estonia

Abstract

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The quantitative determinations of technetium abundances are discussed. Up to now Tc abundances were found for nearly 30 stars which all are thermally pulsing AGB stars. The technetium abundance values for these AGB stars atmospheres, where it was found to be present, cluster around −1.0 ÷ 1.7. The fact that Tc is not omnipresent in the atmospheres of AGB stars, which are highly enriched in other heavy elements produced in s-process, is discussed.

Type
The AGB
Information
Symposium - International Astronomical Union , Volume 145: Evolution of Stars: The Photospheric Abundance Connection , 1991 , pp. 317 - 326
Copyright
Copyright © Kluwer 1991 

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