Possible direct method to determine the radius of a star from the spectrum of gravitational wave signals

One of the most important sources of gravitational waves for laser interferometers is coalescing binary black hole (BH)-star systems. In the inspiral phase, the radius of the star has little effect on gravitational waves so that the star can be treated as a point particle. Comparing the waveform of the inspiral phase with a theoretical template using matched filtering techniques, each mass and spin of the star and BH can be determined respectively.