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Production of Helium by Stellar Evolution

Published online by Cambridge University Press:  30 March 2016

R. Kippenhahn
R. Kippenhahn*
Affiliation:
Universitäts-Sternwarte Göttingen, Göttingen, D.B.R.

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In order to maintain the luminosity of the Galaxy ⅓ of a solar mass of hydrogen has to be transformed into helium every year. This rate of production is too small by a factor 10 or 20 in order to give a helium content of Y = 0.3-04. within the age of the galaxy if the mass fraction Y of helium was zero at the beginning. The situation is even worse if the destruction of helium by helium burning is taken into account. In his review paper Tayler (1967) came already to this conclusion. I shall discuss the problem here using more recent model calculations, but we shall come up with the same result.

Type
III. Joint Discussions
Information
Highlights of Astronomy , Volume 2: Highlights of Astronomy. As presented at the XIVth General Assembly of the IAU, 1970 , 1971 , pp. 296 - 300
Copyright
Copyright © Reidel 1971

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