On PPN parameters for dyonic black hole solutions (Q1613326)

Black hole dyonic solutions in 4-dimensional model with dilaton are presented. They are defined up to two functions \(H_e\), \(H_m\) obeying two nonlinear differential equations with boundary conditions imposed. The parametrized post-Newtonian parameters \(\beta\), \(\gamma\) are calculated without knowledge of the explicit formulae for \(H_e\), \(H_m\). These parameters do not depend upon dilatonic coupling constants.