Big bang photosynthesis and pregalactic nucleosynthesis of light elements

Details Big bang photosynthesis and pregalactic nucleosynthesis of light elements Big bang photosynthesis and pregalactic nucleosynthesis of light elements

Jun 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985apj...293l..53a&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor (ISSN 0004-637X), vol. 293, June 15, 1985, p. L53-L57. NASA-supported rese

Astronomy and Astrophysics

Astrophysics

42

Big Bang Cosmology, Elementary Particles, High Energy Interactions, Nuclear Fusion, Photosynthesis, Energetic Particles, Light Elements, Particle Mass, Particle Production

Scientific paper

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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