The Origin of early Li-6 and the Reionization of the Universe

Details The Origin of early Li-6 and the Reionization of the Universe The Origin of early Li-6 and the Reionization of the Universe

2005-09-14

arxiv.org/abs/astro-ph/0509380v1

Astronomy and Astrophysics

Astrophysics

5 pages, no figures, to appear in "Element Stratification in Stars, 40 years of Atomic Diffusion", Eds. G, Alecian, O. Richard

Scientific paper

10.1051/eas:2005094

Observational data on the early galactic abundances of the light elements lithium, beryllium and boron are combined with data related to the reionization of the intergalactic medium (IGM) in a search of processes happening in the early universe. Early massive metal-free stars (Pop III), largely held responsible for the reionization of the IGM, are proposed to have been also at the origin of the lithium-6 plateau, through their winds. In this sense the evolution of the Li-6/Be-9 ratio appears to be a key parameter for the history of nucleosynthesis, as a monitor of the early formation of metals and their subsequent injection in high energy particles.

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