Radial oscillations of neutral and charged hybrid stars

Understand

We construct stellar models of hadron stars and hybrid stars and calculate the frequencies of their lowest radial mode of vibration.

• Chandrasekhar's equation for radial oscillations is generalized for stars with internal electric fields and earlier versions of that generalization are simplified.
• For the hybrid stars a Gibbs construction is employed.
• It is found that the softening of the equation of state associated with the presence of deconfined quarks reduces the oscillation frequency.