CNO production in first generation stars

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dc.creatorEkström, Sylvia
dc.creatorMeynet, Georges
dc.creatorMaeder, André
dc.date2006-10-11
dc.date.accessioned2026-07-07T10:23:52Z
dc.date.available2026-07-07T10:23:52Z
dc.descriptionBig Bang nucleosynthesis produces only light elements and the very first generation stars are thus formed from metal-free clouds. They start the production of heavy elements during their life, and enrich the interstellar medium through their explosive death. Stellar evolution models show that the treatment of rotation has important effects on the evolution of those metal-free stars: for example, rotating models produce up to five orders of magnitude more primary nitrogen than non rotating models, due to internal mixing. This will have an impact in the composition of the second generation stars, some of which may now be observed in the Galactic halo. In the case Population III stars were very massive and would end up as direct black holes, rotation again have an interesting effect of enhancing mass loss through centrifugal force and surface enrichment. CNO composition patterns observed in ultra metal-poor halo stars may be explained by a 'wind only' contribution.
dc.description5 pages, 2 figures, contribution to "Nuclei in the Cosmos IX", June 25-30 2006, CERN, Geneva, to appear in Proceedings of Science
dc.identifierhttps://arxiv.org/abs/astro-ph/0610310
dc.identifierhttp://arxiv.org/abs/astro-ph/0610310
dc.identifierPoSNIC-IX:091,2006
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/175987
dc.subjectAstrophysics
dc.titleCNO production in first generation stars
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