Carbon abundances and isotope ratios in 70 bright M giants

Bibcode
1991MNRAS.249...62L
Lazaro, C.; Lynas-Gray, A. E.; Clegg, R. E. S.; Mountain, C. M.; Zadrozny, A.
Bibliographical reference

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 249, March 1, 1991, p. 62-68.

Advertised on:
3
1991
Number of authors
5
IAC number of authors
1
Citations
17
Refereed citations
15
Description
Approximate carbon abundances and C-12/C-13 isotope ratios are obtained for 70 M giant stars from intermediate-resolution spectrophotometry of the CO bands near 2.3 microns. A low mean carbon abundance (C/H = -0.64 + or - 0.29) is obtained, suggesting that standard mixing is insufficient to explain atmospheric abundances in M giants. HR 8795 appears to be exceptionally carbon deficient, and is worthy of further study as a possible weak G-band star descendant.
Type
Refereed
Giant stars
M stars
G stars
K stars
Stellar atmospheres

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