Figure 1
Orbit of a test particle in a co-rotating frame around a circular binary with M2/M1 = 0.1.
The red and blue circles shows the tidal disruption radii around the primary and secondary black holes, respectively. The three black crosses mark the Lagrange points, L1, L2, and L3. Both axes are normalized by the binary semi-major axis. The black solid line shows the motion of a test particle inside the zero-velocity curve for a Jacobi constant CJ = 3.45, and the shaded area outside the curve denotes the forbidden zone29.
