  The equation of state provided by effective models of strongly interacting
matter should comply with the restrictions imposed by current astrophysical
observations on compact stars. Using the equation of state given by the
(axial-)vector meson extended linear sigma model, we determine the mass-radius
relation and study whether these restrictions are satisfied under the
assumption that most of the star is filled with quark matter. We study the
dependence of the mass-radius relation on the parameters of the model.
