Minidisk Accretion onto Spinning Black Hole Binaries: Quasi-periodicities and Outflows

Abstract We perform a full 3D general relativistic magnetohydrodynamical (GRMHD) simulation of an equal-mass, spinning, binary black hole approaching merger, surrounded by circumbinary disk and with minidisk around each hole. For this purpose, we evolve the ideal GRMHD equations on top approximated spacetime for that is valid in every position space, including horizons, during inspiral regime. use relaxed initial data from previous long-term simulation, where accretion dominated m = 1 overdensity called lump. compare our new spinning non-spinning run, studying how spin influences properties. analyze inner edge lump to hole, focusing angular momentum budget fluid minidisks. find minidisks case have more mass over cycle than case. However, both cases most received holes delivered direct plunging material also morphology variability electromagnetic fluxes, they share same periodicities rate. In case, outflows are stronger Our results will be useful understand produce realistic synthetic light curves spectra, which can used future observations.