Author： Audouze J.
Publisher： Springer Publishing Company
ISSN： 0004-640X
Source： Astrophysics and Space Science, Vol.265, Iss.1-4, 1999-01, pp. : 23-27
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Abstract
The main outcome of the primordial nucleosynthesis is the ability to account for the abundances of D, ^3He, ^4He and ^7Li with the proper choice of the nuclear density parameter ω_B. The relative advantages/disadvantages of D and ^7Li as the proper `baryometer' are discussed. In favour of D, the main arguments are the relative simplicity of the formation/destruction schema, but this is challenged by the large uncertainties on the choice of its actual `primordial' abundance and on the galactic evolution scheme. In favour of ^7Li there are the confirmation of the so called `Spite plateau' and the observation of ^6Li at the surface of at least one (may be two) Population II stars, but the paucity of such stars such as the possibility of scenarios in which the ^7Li abundance could be affected even in these stars cannot be overlooked.
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