The determination of the abundance of technetium in the atmospheres of red giants

Details The determination of the abundance of technetium in the atmospheres of red giants The determination of the abundance of technetium in the atmospheres of red giants

Nov 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987pazh...13.1019k&link_type=abstract

Pis'ma v Astronomicheskii Zhurnal (ISSN 0320-0108), vol. 13, Nov. 1987, p. 1019-1022. In Russian. In Russian.

Astronomy and Astrophysics

Astronomy

Red Giant Stars, Stellar Atmospheres, Stellar Composition, Technetium, Abundance, Carbon Stars, High Dispersion Spectrographs, Line Spectra, Stellar Spectra

Scientific paper

The Tc abundance in the atmospheres of S and C stars is determined from spectra in the visible range. A comparison is made between regions of the synthetic spectrum containing the Tc 5924.47 A line and observed high-dispersion spectra. It is found that a reliable determination is possible only for pure S and SC stars. For late carbon stars, the upper limit to the Tc abundance can be estimated. For TX Psc (C6.5), this amounts to lg epsilon (Tc) = 0.5.

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