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

Studying radiation of a white dwarf star falling on a black hole
Marek Niko{l}ajuk (Faculty of Physics, University of Bia{l}ystok, Bialystok, Poland), Tomasz Karpiuk (Faculty of Physics, University of Bia{l}ystok, Bialystok, Poland), Lorenzo Ducci (Department of Astronomy, University of Geneva, Versoix, Switzerland, Institut fuer Astronomie und Astrophysik, Kepler Center for Astro and Particle Physics, Eberhard Karls Universitat, Tuebingen, Germany), Miros{l}aw Brewczyk (Faculty of Physics, University of Bia{l}ystok, Bialystok, Poland)
arXiv:2208.11525v3 Announce Type: replace
Abstract: 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 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 loses 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 {it 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 types.arXiv:2208.11525v3 Announce Type: replace
Abstract: 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 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 loses 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 {it 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 types.