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On Technetium Abundance in Late-type Stars

Published online by Cambridge University Press:  19 July 2016

T. A. Kipper
T. A. Kipper*
Affiliation:
Tartu Astrophysical Observatory, 202444 Tõravere, Estonian SSR, USSR

Abstract

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Technetium abundances in the atmospheres of S- and C-stars are estimated by comparing the synthetic spectra and high dispersion observed spectra for the TcI λ 5924.47 region. It was found that reliable estimates are possible only for the pure S-stars and SC-stars. For the late carbon stars only the upper limit of the Tc abundance can be found. For TX Psc (C6.5) it was found to be lgεTc = 0.5.

Type
VI. Chemical Composition of Stars
Information
Symposium - International Astronomical Union , Volume 132: The Impact of Veryhigh S/N Spectroscopy on Stellar Physics , 1988 , pp. 459 - 462
Copyright
Copyright © Kluwer 1988 

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