1304.7787 (C. Reisswig et al.)

Formation and Coalescence of Cosmological Supermassive Black Hole
Binaries in Supermassive Star Collapse    [PDF]

C. Reisswig, C. D. Ott, E. Abdikamalov, R. Haas, P. Moesta, E. Schnetter

We study the collapse of rapidly rotating supermassive stars that may have formed in the early Universe. By self-consistently simulating the dynamics from the onset of collapse using three-dimensional general-relativistic hydrodynamics with fully dynamical spacetime evolution, we show that seed perturbations in the progenitor can lead to the formation of a system of two high-spin supermassive black holes, which inspiral and merge under the emission of powerful gravitational radiation that could be observed at redshifts z>10 with the DECIGO or Big Bang Observer gravitational-wave observatories, assuming supermassive stars in the mass range 10^4-10^6 Msol. The remnant is rapidly spinning with dimensionless spin a^*=0.9. The surrounding accretion disk contains ~10% of the initial mass.

View original: http://arxiv.org/abs/1304.7787