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Cited by 218

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Constraints on cosmology and neutrino physics from big bang nucleosynthesis

Yang, J., Schramm, D. N., Steigman, G., Rood, R. T.·1979·The Astrophysical Journal
DOI 10.1086/156779
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Abstract

Calculations of primordial nucleosynthesis are performed and used to study the dependence of the predicted abundances on the number of neutrino flavors and the time variation of the gravitational constant. Constraints on the primordial abundance of He-4 are reviewed, and it is suggested that this abundance, Y, is not greater than about 0.25. Severe constraints are placed on the number of lepton flavors (i.e., the number of types of light two-component neutrino), the present nucleon density, and the time variation of the gravitational constant. Primordial abundances of D, He-3, He-4, and Li-7 are computed for several values of lepton number over a range of nucleon densities. The results are compared with the observed abundances of D and Li-7. It is concluded that the universe cannot be closed by nucleons.

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Metadata

Authors
Yang, J., Schramm, D. N., Steigman, G., & Rood, R. T.
Venue
The Astrophysical Journal
Publisher
American Astronomical Society
Published
1979-01
Volume
227
Pages
697
ISSN
  • 0004-637X (ISSN-L)
  • 1538-4357
DOI
10.1086/156779
OpenAlex
W2061861145
Cited by
218
References
0
FWCI
39.73
Type
journal article
Language
en
Open access
closed

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CoChat. (2026). Citation check: Constraints on cosmology and neutrino physics from big bang nucleosynthesis. https://app.cochat.ai/papers/10.1086/156779
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Yang, J., Schramm, D. N., Steigman, G., & Rood, R. T. (1979). Constraints on cosmology and neutrino physics from big bang nucleosynthesis. The Astrophysical Journal. https://doi.org/10.1086/156779

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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).

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