The Herbig Haro system with two equal sized black holes (repelling each other, with less than 15 % mass ratio see LIGO) is the main conundrum to solve of Black Hole physics and Big Bang Cosmology.( Q-FFF Theory) see: https://vixra.org/pdf/2101.0158v1.pdf
Important fact: the LIGO measurements (below) show us the reality.
see also: Solving the Dual Herbig Haro Black Hole System is Solving a String Theory of Everything. see: https://www.researchgate.net/publication/350458158_Solving_the_Dual_Herbig_Haro_Black_Hole_System_is_Solving_a_String_Theory_of_Everything