PMID: 9419322Feb 21, 1998Paper

Primordial nucleosynthesis

Proceedings of the National Academy of Sciences of the United States of America
D N Schramm

Abstract

With the advent of the new extragalactic deuterium observations, Big Bang nucleosynthesis (BBN) is on the verge of undergoing a transformation. In the past, the emphasis has been on demonstrating the concordance of the BBN model with the abundances of the light isotopes extrapolated back to their primordial values by using stellar and galactic evolution theories. As a direct measure of primordial deuterium is converged upon, the nature of the field will shift to using the much more precise primordial D/H to constrain the more flexible stellar and galactic evolution models (although the question of potential systematic error in 4He abundance determinations remains open). The remarkable success of the theory to date in establishing the concordance has led to the very robust conclusion of BBN regarding the baryon density. This robustness remains even through major model variations such as an assumed first-order quark-hadron phase transition. The BBN constraints on the cosmological baryon density are reviewed and demonstrate that the bulk of the baryons are dark and also that the bulk of the matter in the universe is nonbaryonic. Comparison of baryonic density arguments from Lyman-alpha clouds, x-ray gas in clusters, and the microw...Continue Reading

References

Nov 19, 1971·Nature·K A Smith, P D Robertson
Feb 1, 1985·Physical Review. D·C T Hill, D N Schramm
Jul 15, 1996·Physical Review. D·G JungmanD N Spergel
Aug 7, 1989·Physical Review Letters·W MampeA Steyerl
May 23, 1994·Physical Review Letters·P J Kernan, L M Krauss
May 8, 1995·Physical Review Letters·E I GatesM S Turner
Nov 27, 1995·Physical Review Letters·N HataP Langacker
Feb 12, 1996·Physical Review Letters·G JungmanD N Spergel
Sep 2, 1996·Physical Review Letters·W HendersonS Bhattacharya
May 23, 1970·Nature·H ReevesF Hoyle
Aug 15, 1948·J Wash Acad Sci·R E ALPHER
Jun 1, 1993·Annals of the New York Academy of Sciences·R Mushotzky

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Citations

Jan 14, 1998·Proceedings of the National Academy of Sciences of the United States of America·P J Peebles

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