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CNO overabundances in 6 stars of Ω centauri

Published online by Cambridge University Press:  07 August 2017

A. Milone ,
B. Barbuy ,
M. Spite  and
F. Spite
A. Milone
Affiliation:
IAG-USP, Depto. Astronomia C.P. 9638, SÃo Paulo 01065, Brazil
B. Barbuy
Affiliation:
IAG-USP, Depto. Astronomia C.P. 9638, SÃo Paulo 01065, Brazil
M. Spite
Affiliation:
Observatoire de Paris-Meudon 92195 Meudon Pl. Cedex, France
F. Spite
Affiliation:
Observatoire de Paris-Meudon 92195 Meudon Pl. Cedex, France

Extract

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C2 and CN bandheads in the wavelength region λλ 550-680 nm are synthesized for 6 stars of ω Centauri, in order to derive their carbon and nitrogen abundances. Oxygen abundances are also derived taking into account molecular associations with C and N compounded molecules, using the appropriate C and N abundances.

These determinations have been made for CO-rich and CO-normal stars according to the CO indices measured by Persson et al. (1980).

Type
Poster Papers
Information
Symposium - International Astronomical Union , Volume 149: The Stellar populations of Galaxies , 1992 , pp. 458
Copyright
Copyright © Kluwer 

References

François, P., Spite, M., Spite, F.: 1988, A&A 191, 267.Google Scholar
Persson, S.E., Frogel, J.A., Cohen, J.G., Aaronson, M., Mathews, K.: 1980, ApJ 235, 452.Google Scholar