Inferring physical parameters of compact stars from their f-mode gravitational wave signals

Understand

We propose here a robust scheme to infer the physical parameters of compact stars from their f-mode gravitational wave signals.

• We first show that the frequency and the damping rate of f-mode oscillation of compact stars can be expressed in terms of universal functions of stellar mass and moment of inertia.
• By employing the universality in the f-mode one can then infer accurate values of the mass, the moment of inertia and the radius of a compact star.
• In addition, we demonstrate that our new scheme works well for both realistic neutron stars and quark stars, and hence provides a unifying way to infer the physical parameters of compact stars.