Velocity channel maps of the NH₃(1,1) column density in the Cha-MMS1 core. The column densities are shown using a logarithmic colour scale. The LSR velocity in km s^-1 of the velocity channel is indicated in the bottom of each panel, and the mass in M_⊙ in this channel is indicated in the top left corner. The green line indicates the axis of rotation determined from the velocity distribution. The positions of Cha-MMS1a and the Spitzer 24 μm peak are marked with a plus sign and a triangle, respectively.