Studying radiation of a white dwarf star falling on a black hole

We investigate electromagnetic and gravitational radiation generated during a process of the tidal stripping of a white dwarf star circulating a black hole. We model a white dwarf star by a Bose-Fermi droplet at zero temperature and use the quantum hydrodynamic equations to simulate evolution of a black hole-white dwarf binary system. While going through the periastron, the white dwarf looses a small fraction of its mass. The mass falling onto a black hole is a source of powerful electromagnetic and gravitational radiation. Bursts of ultraluminous radiation are flared at each periastron passage. This resembles the recurrent flaring of X-ray sources discovered recently by Irwin et al.. Gravitational energy bursts occur mainly through emission at very low frequencies. The accretion disc, formed due to stripping of a white dwarf, starts at some point to contribute continuously to radiation of both electromagnetic and gravitational type.