Upper panels: HCO⁺ 1→0 (left) and C¹⁷O 1→0 (right) integrated velocity maps obtained with the PdBI from 4 to 8 km s^-1. Blue contours levels are percentages of the maximum (0.15 Jy beam^-1 for C¹⁷O and 0.22 Jy beam^-1 for HCO⁺) from 10 to 90 in steps of 10. The position of the central source is marked by a yellow star. The magenta arrow indicates the direction of the jet (∼70^◦) reported by Rodríguez et al. (2014). The red contour represents the half maximum power contour. The ellipse in the left bottom corner indicates the synthesized beam sizes: 5.41″× 4.31″ with a position angle (PA) of 39^◦ for HCO⁺ 1→0 and 4.58″× 3.98″ with a PA of 49^◦ for the C¹⁷O. Lower panels: corresponding uv plots to the upper maps. The uv plot shows the real part of visibilities as a function of the uv distance, binned in circular rings in steps of 5 m.