The video shows a dynamical interaction between a binary of black holes and a single black hole. The reference frame is referred to the center of mass of the initial binary.
The colour of the trajectories are of the following black holes:
– Orange = primary black hole in the initial binary, 43 solar masses
– Cyan = secondary black hole in the initial binary, 33 solar masses
– Pink = single initial black hole, 85 solar masses
The interaction lasts 10^5 yr, and it ends with an exchange in which the pink black hole replaces the orange one in the initial binary. I created this video only with the Matplotlib and the NumPy libraries in Python, while I performed the simulation with the direct N-body code ARWV (check it out! which includes relativistic corrections of the orbits.
The phases of the interaction:
0:15 First exchange
0:30 Resonant interactions
4:55 Final Outcome (Is an exchange!)
If you want to know more, check my work here