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.