Abstract
SINCE the discovery of the 3° K cosmic blackbody radiation1, the hypothesis of helium formation in a primordial fireball has received some support. Peebles2 and Wagoner, Fowler and Hoyle3 have deduced a value Y≅0.25 for the abundance of helium, by mass, synthesized in the hot big-bang. If this value for the abundance of helium were found in the oldest stars of our galaxy—that is, in the extreme population II stars of globular clusters—the big-bang cosmological model would receive further strong support.
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CASTELLANI, V., GIANNONE, P. & RENZINI, A. Population II Star Models and Abundance of Primaeval Helium. Nature 222, 151–153 (1969). https://doi.org/10.1038/222151a0
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DOI: https://doi.org/10.1038/222151a0
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