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The 12C/13C Ratio in Unevolved Cool Stars

Published online by Cambridge University Press:  19 July 2016

Y. Chmielewski  and
D. L. Lambert
Y. Chmielewski
Affiliation:
Observatoire de Genève, 1290 Sauverny, Switzerland
D. L. Lambert
Affiliation:
Department of Astronomy, University of Texas, Austin, TX 78712, USA

Abstract

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We show that the carbon isotope ratio 12C/13C in the atmosphere of dwarf stars can be determined with reasonable accuracy from high resolution, high signal-to-noise ratio observations of the CH G-band in their spectra. Lines suitable for this purpose are selected from consideration of the solar case, for which 12C/13C = 89 is derived. A preliminary analysis of these features in the spectra of μ Her, δ Eri and τ Cet yields 12C/13C values of 84, 80 and 150 respectively.

Type
VII. Abundance Constraints on Stellar Evolution, Nucleosynthesis, and Cosmological Theories
Information
Symposium - International Astronomical Union , Volume 132: The Impact of Veryhigh S/N Spectroscopy on Stellar Physics , 1988 , pp. 589 - 592
Copyright
Copyright © Kluwer 1988 

References

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