Stiffness effects on the dynamics of the bar-mode instability of Neutron   Stars in full General Relativity
  We present results on the effect of the stiffness of the equation of state on the dynamical bar-mode instability in rapidly rotating polytropic models of neutron stars in full General Relativity. We determine the change in the threshold for the emergence of the instability for a range of the adiabatic $\Gamma$ index from 2.0 to 3.0, including two values chosen to mimic more realistic equations of state at high densities. 
Frank L\"offler and Roberto De Pietri and Alessandra Feo and Luca   Franci and Francesco Maione
gr-qc