
%0 Journal Article
%A Van der Borght, R 
%A Meggitt, S 
%T Equilibrium Models of Stars Composed of Pure Helium
%J Australian Journal of Physics
%D 1963/03/01
%V 16
%N 1
%P 68-73
%K 
%R https://doi.org/10.1071/PH630068
%U https://www.publish.csiro.au/paper/PH630068 
%X Nine equilibrium models of pure helium stars have been calculated for a range of 1 to 17 solar masses. It is shown that for stars larger than two solar masses radiation pressure cannot be neglected. The main effects are a marked reduction in luminosity and a larger core. The change in luminosity does not alter the "main sequence" line in the Hertzsprung·Russell diagram, but shifts the masses down along this line. There is a small decrease in radius accompanied by a corresponding increase in central density. 
