Abundances of elements of cosmological interest

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Abundance, Astrophysics, Big Bang Cosmology, Helium Isotopes, Interstellar Matter, Light Elements, Baryons, Deuterium, Galactic Evolution, Globular Clusters, H Ii Regions, Hydrogen Isotopes, Lithium Isotopes, Main Sequence Stars, Nuclear Fusion, Solar System

Scientific paper

An attempt is made to explain current knowledge about the present abundance of H-1, D, He-3, He-4, and Li-7 in the intestellar medium and what estimates of their primordial abundances can be made when the effects of nuclear synthesis and destruction are allowed for. Estimates of present-day and primordial abundances of the relevant elements are summarized and plotted against the predicted Big-Bang values. Greatest emphasis is given to helium, with its abundance estimated for the solar neighborhood, globular clusters and field stars of the galactic halo population, and galactic and extragalactic H II regions.

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