Astronomy and Astrophysics – Astrophysics
Scientific paper
Jun 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999a%26a...346..520d&link_type=abstract
Astronomy and Astrophysics, v.346, p.520-522 (1999)
Astronomy and Astrophysics
Astrophysics
6
Stars: Abundances, Stars: Late-Type, Stars: Agb And Post-Agb, Stars: Carbon, Molecular Processes
Scientific paper
de Laverny & Gustafsson (1998, Paper I) questioned the iso-intensity method used by Ohnaka & Tsuji (1996) to derive carbon isotopic ratios in cool carbon stars. As a reply, Ohnaka & Tsuji (1998) pointed out that the method criticized in Paper I differs from the original one and conclude that our results are unreliable. No comparison of the two methods was, however, made. The iso-intensity method used in Paper I and OT96 do slighty differ in their definition. In investigating the consequences of this difference we have found that they are rather insignificant. We therefore confirm that the iso-intensity method is not reliable when applied to crowded spectra of cool stars. That reinforces the conclusions presented in Paper I.
de Laverny Patrick
Gustafsson Bengt
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