CNO abundances of some field horizontal-branch and Population I A stars
Journal Article
·
· Publ. Astron. Soc. Pac.; (United States)
From observations of infrared lines, oxygen and nitrogen abundances of the prototype field horizontal-branch stars HD 109995 and HD 161817, the somewhat similar star HD 64488, and the sharp-lined Population I A stars Theta Leo and HR 6559 have been obtained, as well as carbon abundances of HD 161817 and Theta Leo. The results for HD 161817 may be in accord with the predictions of Sweigart and Mengel (1979) for dredge-up during the previous red-giant stage if the non-LTE effects for the O I lines have been properly accounted for, and those for the C I and N I lines are small. This star and HD 109995 are apparently both oxygen and nitrogen poor to the same degree although their iron abundances differ by 0.3 dex. 36 references.
- Research Organization:
- NASA, Goddard Space Flight Center, Greenbelt, MD; Kitt Peak National Observatory, Tucson, AZ; Van Vleck Observatory, Middletown, CT; Union College, Schenectady, NY
- OSTI ID:
- 6913578
- Journal Information:
- Publ. Astron. Soc. Pac.; (United States), Journal Name: Publ. Astron. Soc. Pac.; (United States) Vol. 98; ISSN PASPA
- Country of Publication:
- United States
- Language:
- English
Similar Records
A NON-LTE STUDY OF SILICON ABUNDANCES IN GIANT STARS FROM THE Si i INFRARED LINES IN THE zJ -BAND
Carbon, nitrogen, and oxygen abundances in main-sequence stars. I. Procyon and the hyades cluster stars 45 tauri and HD 27561
Evolutionary status of Mu Leonis
Journal Article
·
Fri May 20 00:00:00 EDT 2016
· Astrophysical Journal
·
OSTI ID:22666264
Carbon, nitrogen, and oxygen abundances in main-sequence stars. I. Procyon and the hyades cluster stars 45 tauri and HD 27561
Journal Article
·
Tue Aug 01 00:00:00 EDT 1978
· Astrophys. J.; (United States)
·
OSTI ID:6659006
Evolutionary status of Mu Leonis
Journal Article
·
Tue Sep 01 00:00:00 EDT 1987
· Publ. Astron. Soc. Pac.; (United States)
·
OSTI ID:5605499