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Title:
Big bang photosynthesis and pregalactic nucleosynthesis of light elements
Authors:
Audouze, J.; Lindley, D.; Silk, J.
Affiliation:
AA(CNRS, Institut d'Astrophysique, Paris; CNRS, Centre de Spectrometrie Nucleaire et de Spectrometrie de Masse, Orsay, Essonne, France), AB(Fermi National Accelerator Laboratory, Batavia, IL), AC(California, University, Berkeley, CA)
Publication:
Astrophysical Journal, Part 2 - Letters to the Editor (ISSN 0004-637X), vol. 293, June 15, 1985, p. L53-L57. NASA-supported research. (ApJL Homepage)
Publication Date:
06/1985
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
Big Bang Cosmology, Elementary Particles, High Energy Interactions, Nuclear Fusion, Photosynthesis, Energetic Particles, Light Elements, Particle Mass, Particle Production
DOI:
10.1086/184490
Bibliographic Code:
1985ApJ...293L..53A

Abstract

Two nonstandard scenarios for pregalactic synthesis of the light elements (2H, 3He, 4He, and 7Li) are developed. Big bang photosynthesis occurs if energetic photons, produced by the decay of massive neutrinos or gravitinos, partially photodisintegrate 4He (formed in the standard hot big bang) to produce 2H and 3He. In this case, primordial nucleosynthesis no longer constrains the baryon density of the universe, or the number of neutrino species. Alternatively, one may dispense partially or completely with the hot big bang and produce the light elements by bombardment of primordial gas, provided that 4He is synthesized by a later generation of massive stars.

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