MS in gas according to our simulation with a 9:1 LMC–SMC mass ratio. The top three panels A–C show the column density of simulated Stream material in Magellanic Coordinates (Nidever et al. 2008). Gas from the SMC and LMC is displayed individually in panels A and B, respectively, along with the current observed position of the galaxies (blue squares). Panel C shows the full H I Stream in our simulation. Column density is computed in bins of 35 arcminutes, and densities below 5.2 × 10¹⁷ cm⁻² are blanked to make mock observations similar to those presented in Nidever et al. (2010). Overplotted in this panel are data from Nidever et al. (2010) shown in logarithmic contours at levels of N_gas = {10¹⁹ cm⁻² (black lines), 10²⁰ cm⁻² (gray lines), and 10²¹ cm⁻² (white lines)}. Also shown on this panel are the orbit lines for the LMC and SMC since entering the MW potential. The LMC orbit is indicated by the solid black line while the SMC is indicated by the dashed black line. Panel D shows the maximum column density of H I gas both in our simulated Stream and from the data.