H¹³CO⁺(top) and HC¹⁵N (bottom) channel maps with a velocity resolution of 0.5 km s⁻¹. The rms for each map are 0.011 Jy beam⁻¹ km s⁻¹ channel⁻¹ and 0.012 Jy beam⁻¹ km s⁻¹ channel⁻¹, respectively. Emission is detected in each map with a S/N of 6.8 and 5.7, respectively. The black contours are at the 3 and 5σ level. The grey dashed contour shows the Keplerian mask used and the dotted white lines mark the major and minor axes of the disk.