A Free Boundary Problem in the Theory of the Stars
  We investigate numerically models of the static spherically symmetric boson-fermion stars in the scalar-tensor theory of gravity with massive dilaton field. The proper mathematical model of such stars is interpreted as a nonlinear two-parametric eigenvalue problem with unknown internal boundary. To solve this problem the Continuous Analogue of Newton Method is used. 
S. S. Yazadjiev (University of Sofia, Bulgaria), T. L. Boyadjiev   (University of Sofia, Bulgaria), M. D. Todorov (Technical...