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. 
Yasufumi Kojima, Koh-ichi Sakata