Dark matter admixed neutron stars

Neutron stars could contain a mixture of ordinary nuclear matter and dark matter, such that influence observable properties the star, as its mass radius. We study these admixed neutron for two choices matter: free Fermi gas mirror matter. In addition to solving multifluid Tolmon-Oppenheimer-Volkoff equations static solutions presenting mass-radius diagrams, we focus on computations are lacking in literature. The first is rigorous determination stability over whole parameter space, which do using different methods. method based harmonic time-dependent perturbations radial oscillation frequency. second method, less well-known, conveniently makes use unperturbed, only. computation frequency, fundamental modes, large swaths space.