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Stiffness effects on the dynamics of the bar-mode instability of neutron stars in full general relativity

2015; American Physical Society; Volume: 91; Issue: 6 Linguagem: Inglês

10.1103/physrevd.91.064057

1550-7998

Frank Löffler, R. De Pietri, Alessandra Feo, Francesco Maione, Luca Franci,

High-pressure geophysics and materials

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.