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Astrophysics > Astrophysics of Galaxies

arXiv:1306.4836 (astro-ph)
[Submitted on 20 Jun 2013]

Title:The evolution of C and O abundances in stellar populations

Authors:Poul E. Nissen, William J. Schuster
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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.
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
Subjects: Astrophysics of Galaxies (astro-ph.GA); Solar and Stellar Astrophysics (astro-ph.SR)
Cite as: arXiv:1306.4836 [astro-ph.GA]
  (or arXiv:1306.4836v1 [astro-ph.GA] for this version)
  https://doi.org/10.48550/arXiv.1306.4836
Related DOI: https://doi.org/10.1017/S1743921313006212

Submission history

From: Poul E. Nissen [view email]
[v1] Thu, 20 Jun 2013 11:54:23 UTC (60 KB)
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