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Predicting Big Bang Deuterium
N. Hata, R. J. Scherrer, G. Steigman +2
We present new upper and lower bounds to the primordial abundances of deuterium and helium-3 based on observational data from the solar system and the interstellar medium. Independ…
Big Bang Nucleosynthesis: Consistency Or Crisis ?
Gary Steigman
The early, hot, dense, expanding Universe was a primordial reactor in which the light nuclides D, 3He, 4He and 7Li were synthesized in astrophysically interesting abundances. The c…
Cosmic Deuterium Or A Hydrogen Interloper ?
Gary Steigman
Two groups have independently reported the possible detection of extragalactic deuterium in the absorption spectrum of the same high redshift, low metalicity QSO. Although the high…
On the Abundance of Primordial Helium
Keith A. Olive, Gary Steigman
We have used recent observations of helium-4, nitrogen and oxygen from some four dozen, low metallicity, extra-galactic HII regions to define mean versus , versus …