Introduction to Big Bang nucleosynthesis - Open and closed models, anisotropies

Details Introduction to Big Bang nucleosynthesis - Open and closed models, anisotropies Introduction to Big Bang nucleosynthesis - Open and closed models, anisotropies

Oct 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982rspta.307....3t&link_type=abstract

(Royal Society, Discussion on the Big Bang and Element Creation, London, England, Mar. 11, 12, 1982.) Royal Society (London), Ph

Astronomy and Astrophysics

Astrophysics

4

Abundance, Astronomical Models, Big Bang Cosmology, Elementary Particle Interactions, Nuclear Fusion, Anisotropy, Astronomy, Astrophysics, Baryons, Hubble Constant, Universe

Scientific paper

A variety of observations suggest that the universe had a hot dense origin and that the pregalactic composition of the universe was determined by nuclear reactions that occurred in the first few minutes. There is no unique hot Big Bang theory, but the simplest version produces a primeval chemical composition that is in good qualitative agreement with the abundances deduced from observation. Whether or not any Big Bang theory will provide quantitative agreement with observations depends on a variety of factors in elementary particle physics (number and masses of stable or long-lived particles, half-life of neutron, structure of grand unified theories) and from observational astronomy (present mean baryon density of the universe, the Hubble constant and deceleration parameter). The influence of these factors on the abundances is discussed, as is the effect of departures from homogeneity and isotropy in the early universe.

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