GRAVITY continuum model images and Brγ-line-emitting gas region. The black filled dot shows the continuum (star + halo + disk) photocenter. The white circle around that point gives the error on the continuum photocenter position estimated from the continuum modeling. The red circle represents the gas region size estimated at the peak emission and is centered on the ~0 km s⁻¹ point. The blue to red colored filled dots show the gas photocenters for different spectral channels, as in Fig. A.3.