  Aims. The aim of this work is to study the dynamical effects of the Galaxy on
binary star systems with physical and orbital charac- teristics similar to
those of the population of known wide binary stars with exoplanets. As
secondary goal we analyse the possible consequences on the stability of a
hypothetical planetary system orbiting one of the stellar components. Methods.
We numerically reproduced the temporal evolution of a sample of 3 * 10 5 binary
star systems disturbed by the Galactic potential and passing stars in an
environment similar to the solar neighbourhood. Results. Our results show that
the dynamical evolution of the population of wide binary stars with exoplanets
in the solar neigh- bourhood is modelled by the process of disruption of binary
star systems induced by the Galaxy. We found that this process depends mainly
on the separation between both stars, whereas it is almost independent of the
initial orbital configuration. Moreover, our calcu- lations are in agreement
with the results of previous works regarding the indirect influence of the
Galaxy on the stability of planetary systems in wide binary stars. However, the
effects on the planetary region show a dependence on the initial configuration
of binary stars. Finally, we obtain an indirect test of the impulse
approximation model for dynamical studies of binary star systems.
