The evolution of C and O abundances in stellar populations
Astrophysics of Galaxies
2015-06-16 v1 Solar and Stellar Astrophysics
Abstract
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 CI and OI 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.
Keywords
Cite
@article{arxiv.1306.4836,
title = {The evolution of C and O abundances in stellar populations},
author = {Poul E. Nissen and William J. Schuster},
journal= {arXiv preprint arXiv:1306.4836},
year = {2015}
}
Comments
6 pages, 5 figures. To appear in Proceedings IAU Symposium No. 298, "Setting the scene for Gaia and LAMOST", eds. S. Feltzing, G. Zhao, N. A. Walton, and P. A. Whitelock