Theoretical stellar ΔY/ΔO in the early Universe
Abstract
Population III stars initiated the chemical enrichment of the Universe. Chemical evolution models seem to favour fast rotators among the very low-metallicity population. When a star rotates fast, it ejects significant quantities of He and its nucleosynthesic products are modified compared to the case without rotation. The value of ΔY/ΔO is explored from a theoretical point of view through stellar models of zero- or very low-metallicity.
- Publication:
-
Light Elements in the Universe
- Pub Date:
- April 2010
- DOI:
- 10.1017/S1743921310004618
- Bibcode:
- 2010IAUS..268..447E
- Keywords:
-
- nucleosynthesis;
- stars: rotation;
- early universe