1 Department of Physics and Astronomy, Science and Technology, Aarhus University2 Department of Physics and Astronomy - Stellar Astrophysics Centre, Department of Physics and Astronomy, Science and Technology, Aarhus University3 Observatorio Astronomico National, UNAM, Ensenada4 Department of Physics and Astronomy, Science and Technology, Aarhus University
Carbon and oxygen abundances in F and G main-sequence stars ranging in metallicity from [Fe/H] = -1.6 to +0.5 are determined from a non-LTE analysis of C i and O i atomic lines in high-resolution spectra. Both C and O are good tracers of stellar populations; distinct trends of [C/Fe] and [O/Fe] as a function of [Fe/H] are found for high- and low-alpha halo stars and for thick- and thin-disk stars. These trends and that of [C/O] provide new information on the nucleosynthesis sites of carbon and the time-scale for the chemical enrichment of the various Galactic components.
International Astronomical Union. Proceedings, 2014, Vol 9, Issue S298, p. 65-70