Publication Abstracts
Truran et al. 1965
Truran, J.W., C.J. Hansen, and A.G.W. Cameron, 1965: The helium content of the galaxy. Can. J. Phys., 43, 1616-1635, doi:10.1139/p65-152.
It is usually assumed in modern theories of nucleosynthesis that the initial composition of the galaxy was pure hydrogen. The large solar and stellar content of helium has appeared to present a difficulty for such an assumption. This paper examines the problem. Numerical studies are made of the time changes in the compositions of stars and the interstellar medium as a result of stellar evolution. It is concluded that the large helium content of the sun and recently formed stars can be produced only as a result of the evolution of stars of approximately solar mass. Hence the initial hydrogen hypothesis requires a large age for the galaxy (≥ 2×1010 years). The content of long-lived radioactivities in the interstellar medium is also followed as a function of time. It is found that the ratios of radioactivities are very insensitive functions of time and are approximately those observed in the solar system when the helium content is satisfactory. However, it is also concluded that these ratios give little useful information about cosmochronology.
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BibTeX Citation
@article{tr02100q,
author={Truran, J. W. and Hansen, C. J. and Cameron, A. G. W.},
title={The helium content of the galaxy},
year={1965},
journal={Canadian Journal of Physics},
volume={43},
pages={1616--1635},
doi={10.1139/p65-152},
}
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RIS Citation
TY - JOUR ID - tr02100q AU - Truran, J. W. AU - Hansen, C. J. AU - Cameron, A. G. W. PY - 1965 TI - The helium content of the galaxy JA - Can. J. Phys. JO - Canadian Journal of Physics VL - 43 SP - 1616 EP - 1635 DO - 10.1139/p65-152 ER -
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