The 12C/13C Ratio in the Atmosphere of the k2 Supergiant Epsilon Pegasi
Abstract
The 12C/13C abundance ratio in the atmosphere of the K2 Th supergiant E Peg is derived from high-resolution photoelectric spectral scans of lines from the CN red system. The high 13C abundance, 12C/13C = 5.1 + 0 5 and Greene's demonstration that the atmosphere is rich in N and deficient in C and 0, are consistent with the hypothesis that the star has undergone extensive internal mixing. Subject headings: abundances, stellar - late-type stars - stars, individual
- Publication:
-
The Astrophysical Journal
- Pub Date:
- December 1974
- DOI:
- 10.1086/181676
- Bibcode:
- 1974ApJ...194L..89L
- Keywords:
-
- Abundance;
- Atmospheric Composition;
- Carbon 12;
- Carbon 13;
- Stellar Atmospheres;
- Supergiant Stars;
- Astronomical Spectroscopy;
- Hertzsprung-Russell Diagram;
- Late Stars;
- Line Spectra;
- Stellar Spectra;
- Astrophysics