Testing the No-Hair Theorem with Sgr A*

Figure 6

Evolution of the orbital angular momenta of stars around Sgr A* due to frame-dragging (dashed lines) and stellar perturbations (dotted lines) as measured by the angle Δ𝜃 as a function of the orbital semimajor axis 𝑎. The three panels correspond to a Kerr black hole with a spin (a) 𝑎=M, (b) 𝑎=0.1 M, and (c) 𝑎=0 [30].

(a)

(b)

(c)