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

We perform general-relativistic simulations of self-gravitating black hole disks in which the spin is significantly tilted (45\ifmmode^\circ\else\textdegree\fi{} and 90\ifmmode^\circ\else\textdegree\fi{}) with respect to angular momentum disk disk--to--black mass ratio 16--28%. The holes are rapidly spinning dimensionless spins up $\ensuremath{\sim}0.97$. These first self-consistent hydrodynamic such systems, can be prime sources for multimessenger astronomy. In particular black-hole-disk systems lead (i) precession, (ii) precession warping around hole, (iii) earlier saturation Papaloizou-Pringle instability compared aligned/antialigned although a shorter mode growth time scale, (iv) acquisition small black-hole kick velocity, (v) significant gravitational-wave emission via various modes beyond, but as strong as, typical (2,2) mode, (vi) possibility broad alignment spin. This not related Bardeen-Petterson effect resembles solid body rotation. Our suggest that any electromagnetic luminosity from our models may power relativistic jets, those characterizing short gamma-ray bursts. Depending on system scale gravitational waves detected by LIGO/Virgo, LISA and/or other laser interferometers.