Integrated intensity (moment 0) maps in mJy km s⁻¹ beam⁻¹ for C¹⁸O, HCN, CN, C₂H, NO, and HCO⁺ from left to right. The different rows present the results for different depth of the gas gap with the gap depth (δ_{gas gap}) indicated in the top of the left column. The HCN emission is shown on a logarithmic scale to highlight the weak outer ring. The beam is indicated in the bottom left corner of each panel and the tickmarks on the axes are spaced 1″ apart.