Mathematics – Logic
Scientific paper
Feb 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983prhe.work..139g&link_type=abstract
IN: ESO Workshop on Primordial Helium, Garching, West Germany, February 2, 3, 1983, Proceedings (A83-50030 24-90). Garching, Wes
Mathematics
Logic
8
Abundance, Deuterium, Gas Giant Planets, Helium, Planetary Evolution, Solar System, Chemical Composition, Interplanetary Medium, Nebulae, Pluto (Planet)
Scientific paper
The determination of helium and deuterium abundances in the primitive solar nebula from the chemical composition of the sun and giant planets, and the cosmological implications of the results, are discussed. The differentiation of helium from hydrogen within planets during their evolution is examined, and remote sensing methods to infer the H2/He ratio are described. Results for Jupiter and Saturn obtained by Voyager infrared instruments are compared to theoretical predictions. The results indicate that the per mass helium abundance in the primitive nebula was between 0.17 and 0.24, and the per mass deuterium abundance was (1.85-6.3) x 10 to the -5th. These results suggest that either much more deuterium than envisaged by current models of chemical evolution of galaxies was destroyed between the origin of the universe and the birth of the solar system or the standard model of the big bang must be revised in order to lessen the production of primordial helium.
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