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Abundances of the Very Light Elements (D, 3He, 4He and 7LI) And Primordial Nucleosynthesis

Published online by Cambridge University Press:  30 March 2016

Jean Audouze
Jean Audouze*
Affiliation:
Institut d’Astrophysique du CNRS, Paris, France and Laboratoire René Bernas, Orsay, France

Abstract

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The determinations of the primordial abundances of D, 3He, 4He and 7Li play a major role in building up models of Big Bang nucleosynthesis. Much progress has been made recently in that respect but there are still large uncertainties on these determinations. Although canonical Big Bang models predicting a cosmological baryonic parameter ΩB ~ 0.10 consistent with the dynamics of small groups of galaxies and three different families of neutrinos seem to be the most appropriate in accounting for these abundances, the simplest models of galactic evolution lead to discrepant comparisons concerning D and 4He. The relatively small abundance of 4He might challenge the canonical Big Bang models unless specific models of galactic evolution are invoked.

Type
Joint Discussions
Information
Highlights of Astronomy , Volume 7: Highlights of Astronomy. As presented at the XIXth General Assembly of the IAU, 1985 , 1986 , pp. 377 - 382
Copyright
Copyright © Reidel 1986

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