Comparisons of long-baseline and combined data line profiles Left: long-baseline (blue) and combined data (red) line profiles for three different positions (averaged over dashed purple circles in right panels). υ_LSR = 8.3 km s⁻¹, is indicated with black dashed lines in the left panels. Right: the ratio of the¹³ CO line flux between combined and long baseline data as a function of position, where both combined and long baseline emission exceeds 3σ. The line ratio maps suggest that information on larger scales is filtered out by the interferometer. Note: the regions used for averaging in the lower two panels are slightly bigger to improve the S/N. Black contours show the continuum starting at 5σ in steps of 10σ.