Comparison between ¹²CO composite profile in MAP1 (black thick line) and ¹²CO composite profile in MAP2 (blue thin line). The left wings of both profiles are almost coincident, except where δυ < –0.6 km s⁻¹. If we apply a velocity shift of ~ +0.2 km s⁻¹ on MAP2 composite profile (red thin line) it is possible to match also the right wings of both profiles. Again there is a small departure at high δυ.