Radial oscillations of strange quark stars admixed with fermionic dark matter

Abstract

We compute the 11 lowest frequency radial oscillation modes of strange stars admixed with fermionic dark matter. In the two-fluid formalism we integrate the structure equations for hydrostatic equilibrium to compute the mass and the star of the object for three different dark matter amounts. Then we solve the Sturm-Liouville boundary value problem for the perturbations, and we compute the fundamental as well as 10 excited frequency radial modes. The large separation and the second frequency difference for all cases are shown as well.