Self-gravitating disks around rapidly spinning, tilted black holes: General-relativistic simulations

We present general-relativistic simulations of self-gravitating black hole disks in which the spin of the black hole is significantly tilted with respect to the angular momentum of the disk. Such systems lead to black hole and disk precession, as well as to gravitational-wave emission via various modes beyond, but as strong as, the typical (2,2) mode. Our simulations suggest that any electromagnetic luminosity from our models may power relativistic jets, such as those characterizing short gamma-ray bursts. Depending on the black-hole-disk system scale the gravitational waves may be detected by LIGO/Virgo, LISA and/or other laser interferometers.