^14^C in AGB stars: the case of IRC+10216.

Details ^14^C in AGB stars: the case of IRC+10216. ^14^C in AGB stars: the case of IRC+10216.

Feb 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997a%26a...317..883f&link_type=abstract

Astronomy and Astrophysics, v.317, p.883-888

Astronomy and Astrophysics

Astrophysics

4

Stars: Agb, Stars: Individual: Irc +10216, Nucleosynthesis, Stars: Abundances, Molecular Data, Radio Lines: Stars

Scientific paper

Observations and stellar evolution computations have been dedicated to the search for ^14^C in the archetype of AGB stars, IRC+10216/CW Leo. Contrary to Wright's (1994ApJ...436L.157W) tentative detection, we see no trace of ^14^CO in this star down to a 3σ limit R=^13^CO/^14^CO>=1400. The new limit is consistent with our stellar evolution computations, which indicate that R should be > 4000. Comparison of the C, N, O, Mg, Si, and S isotopic ratios observed in this source with the calculated ones reinforces our earlier conclusion that CW Leo had a main sequence mass 3Msun_

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