Abstract
We have performed calculations for the slow neutron capture process (the s process) in stellar models in the mass range 0.9 to 6 solar masses at a metallicity of [Fe/H]=−2.3. The models were computed with two different stellar evolution codes and our results were compared to the composition of the elements heavier than Fe observed in carbon-enhanced metal-poor (CEMP) stars. Our models provide an explanation for the compositions of CEMP stars showing an s-process signature (CEMP-s) but not for the composition of CEMP stars showing both s-process and rapid neutron-capture (r-process) signatures (CEMP-s/r). To explain the composition of CEMP-s/r stars we propose the existence of a s/r neutron-capture process, which may be a superposition of, or a process in-between, the classical s and r processes.
| Original language | English |
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| Title of host publication | Galactic Archaeology: Near-Field Cosmology and the Formation of the Milky Way |
| Editors | W. Aoki, M. Ishigaki, T. Suda, T. Tsujimoto, N. Arimoto |
| Place of Publication | San Francisco |
| Publisher | Astronomical Society of the Pacific |
| Pages | 35-38pp |
| Edition | Not Peer Reviewed |
| ISBN (Print) | 9781583817988 |
| Publication status | Published - 2012 |
| Event | Galactic Archaeology: Near-Field Cosmology and the Formation of the Milky Way - Shuzenji, Japan Duration: 1 Jan 2012 → … http://aspbooks.org/a/volumes/table_of_contents/?book_id=499 |
Conference
| Conference | Galactic Archaeology: Near-Field Cosmology and the Formation of the Milky Way |
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| Period | 1/01/12 → … |
| Other | 16-20 May 2011 |
| Internet address |