GRAVITATIONAL-WAVES FROM PHASE-TRANSITIONS OF ACCRETING NEUTRON-STARS

We propose that when neutron stars in low-mass X-ray binaries accrete sufficient mass and become millisecond pulsars, the interiors of these stars may undergo phase transitions, exciting stellar radial oscillat ions. We show that the radial oscillations will be mainly damped by gr avitational-wave radiation instead of internal viscosity. Such gravita tional waves may be detected by the advanced Laser Interferometer Grav itational-wave Observatory.