Contour map of blue‐ and redshifted high‐velocity HCO⁺ ﹩J=1\rightarrow 0﹩ integrated over 20 km s﹩^{-1}﹩ overlaid on a gray‐scale image of integrated H¹³CN. The red circle marks the position of the protostar, and the white line shows the symmetry axis of the outflow. The star symbol marks the position of IRS 11, and the filled squares are H₂ knots from Davis et al. (1998). The contours are logarithmic and start at 4.6 K km s﹩^{-1}﹩ for HCO﹩^{+}﹩ with a step of 10﹩^{0.2N}﹩, where ﹩N=1,\, 2,\ldots ﹩ . The beam FWHM is plotted in green.