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Big bang photosynthesis and pregalactic nucleosynthesis of light elementsTwo nonstandard scenarios for pregalactic synthesis of the light elements (H-2, He-3, He-4, and Li-7) are developed. Big bang photosynthesis occurs if energetic photons, produced by the decay of massive neutrinos or gravitinos, partially photodisintegrate He-4 (formed in the standard hot big bang) to produce H-2 and He-3. 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 He-4 is synthesized by a later generation of massive stars.
Document ID
19850056899
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Audouze, J.
(CNRS, Institut d'Astrophysique, Paris; CNRS, Centre de Spectrometrie Nucleaire et de Spectrometrie de Masse, Orsay Essonne, France)
Lindley, D.
(Fermi National Accelerator Laboratory Batavia, IL, United States)
Silk, J.
(California, University Berkeley, CA, United States)
Date Acquired
August 12, 2013
Publication Date
June 15, 1985
Publication Information
Publication: Astrophysical Journal, Part 2 - Letters to the Editor
Volume: 293
ISSN: 0004-637X
Subject Category
Astrophysics
Accession Number
85A39050
Funding Number(s)
CONTRACT_GRANT: DE-84ER-40161
CONTRACT_GRANT: NSF AST-82-13345
Distribution Limits
Public
Copyright
Other

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