Heat expansion of star - like cosmic objects induced by the cosmological expansion ∗

The heat expansion of a star-like cosmic object, induced by the cosmo-logical bremsheat production within a moving body, that was predicted by the Projective Unified Field Theory of the author, is approximately treated. The difference to planet-like bodies investigated previously arises from another material constitution.The exponential-like expansion law is applied to a model with numerical values of the Sun. The results are not in contradiction to empirical facts. 1 Review These days it is generally recognized in science that, as the Sun burns through its hydrogen on the main sequence, it steadily grows hotter and therefore more luminous. It is also accepted that through this fact the Sun continuoously grows larger. Recently an interesting paper on this subject has been published (Korycansky et al. 2001). This paper devoted to a similar subject follows the theoretical line of our previous publication on the bremsheat expansion of a moving spherical planet-like body, induced by the expansion of the cosmos (Schmutzer 2000a). This hypothetical bremsheat effect has been derived from the Projective Unified Field Theory (PUFT) of the author (Schmutzer 1995). The moving star-like body considered here may be orbiting around a galactic central body. As usual in astrophysics, the Gauss system of units is used. Let us first repeat the general theoretical results. The radial expansion velocity of the surface of the sphere (r radius of the sphere) reads v = dr dt = 4E S rσ 3 dσ dt. (1) The quantities occurring mean (in our specific terminology): σ is the scalaric world function determined by the scalaric cosmological field equation, whereas