Galaxy formation from annihilation-generated supersonic turbulence in the baryon-symmetric big-bang cosmology and the gamma-ray background spectrum

Following the big-bang baryon-symmetric cosmology of Omnes where an initial phase separation of matter and antimatter leads to regions of pure matter and pure antimatter containing masses of the size of galaxy clusters by a redshift which we calculate to be of the order of 500600, we show that at these redshifts, annihilation pressure at the boundaries between the regions of matter and antimatter drives large-scale supersonic turbulence which can trigger galaxy formation. This picture is consistent with the y-ray background observations discussed previously by Stecker, Morgan, and Bredekamp. Gravitational binding of galaxies then occurs at a redshift of 70 at which time vortical turbulent velocities of 3 x 1 0 cm 1 lead to angular momenta for galaxies comparable with measured values.