Selected channel maps of the geometric Keplerian disk plus spherical halo model (Model D0.6H; see text for description). The upper left panel shows the continuum map, and the white box denotes the plot region for the other panels. The brightness scaling is logarithmic; in the zoomed panels, the continuum was scaled down arbitrarily to emphasize the shape of the line emission. The width of the channels is 10 km s^-1. Note the emission from the 3 au halo in the fourth to sixth panels (visible as the red circle that extends up to a radius of ~ 6′′).