What is the origin of the BAR in the Milky Way? see: https://vixra.org/pdf/2007.0044v1.pdf
Two equal sized gas trailing string black holes ( also dark matter) meet each other called: HHOs ( Herbig Haro Objects also forming primary Comets) forming a BAR. or NOT dependant on the distance of close connection. After merging with othe smaller Galaxies Both HHOs are sprinkeld around the resulting Galaxy.An alternative Rigid Transformer Compound Quark Propeller String for a Closed String. (Q-FFF Model)
The new logic of the blackberry multiverse by mass repelling dark matter black holes.
see also: Herbig Haro Astrophysics Based on Dual Rigid String Black Holes.