Homogeneous stellar model having the chemical composition X = 0.725 and Z = 0.018

Abstract

In a mathematical model having the mass equal to one solar mass, the abundance of the hydrogen X = 0.725 the abundance of helium Y = 0.257, and the abundance of the metals Z = 0.018 is presented. This model corresponds to the old stars of Population II or to the stars of a sequence of the subdwarfish stars with the deficiency of metals. In this paper, the differential equations for the radiative nucleus, their numerical solution, and the numerical results of the model are presented.