Discrimination of Quark Stars from Neutron Stars in Quadrupole Oscillations

The frequencies and damping times due to gravitational radiation are calculated for self-bound quark star models. The results are compared with those for neutron star models. They are markedly contrasted in less relativistic cases. The distinction derived here from a simple model of quark stars may be relevant to the future theoretical and observational studies, since the oscillation properties essentially depend on the mass and radius of an equilibrium star.