Illustration of our kinematic model. Left: two-dimensional project velocity map for a purely rotating disk with an inclination angle of 45°. The blue and red colors represent the positive and negative projected velocities, respectively. Center: global emission map in the Brγ line. It is given by a simple elliptical Gaussian with an elongation cause by the projection onto the sky plane. Right: emission map in a narrow spectral channel centered around 21 664 Å with a resolution of 1.8 Å. It is obtained using the velocity map and the emission map. See Delaa et al. (2011) for more details.