A Search for 14C 16O in the Atmospheres of Evolved Stars
Abstract
The detection of (C-14)(O-16) in the spectra of MS, S, and C stars would provide evidence of the operation of the (C-13)(alpha, n)(O-16) process in the helium-burning shell during the double shell-burning phase corresponding to a star's sojourn on the AGB. In this paper, MS, S, and C star spectra of the first-overtone vibration-rotation bands of the CO molecule at 2.4 microns are analyzed, and no evidence for the presence of (C-14)(O-16) is found. Lower limits on the C-12/C-14 ratio ranging from 5000 to 28,500 are determined.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- July 1987
- DOI:
- 10.1086/165417
- Bibcode:
- 1987ApJ...318..868H
- Keywords:
-
- Carbon Monoxide;
- Carbon Stars;
- S Stars;
- Stellar Atmospheres;
- Stellar Evolution;
- Stellar Spectrophotometry;
- Asymptotic Giant Branch Stars;
- Carbon 14;
- Giant Stars;
- Nuclear Fusion;
- Oxygen Isotopes;
- Spectrum Analysis;
- Astrophysics;
- NUCLEOSYNTHESIS;
- STARS: ABUNDANCES;
- STARS: CARBON;
- STARS: S-TYPE