:see LIGO/VIRGO)
As example: all dual Herbig Haro hotspots (bowshocks) see https://www.ligo.org/science/Publication-O3aCatalog/
"Mass ratio and total mass estimates for all O3a events. Contours represent 90% credible intervals. Six unique events are highlighted"
Q-FFF Theory says: Black holes do repel Fermions (mass) by their rotating propeller forms pushe away by the spacetime concentration at the BH horizon, which is the origin of Herbig Haro forming a pushing plasma bar between the two BHs.
See also: Herbig Haro Astrophysics Based on Dual Rigid Strings. see: https://bigbang-entanglement.blogspot.com/.../blog-post.html
