Position–velocity diagrams of the [Fe ii] 1643 nm line of HH 1042 (left) and HH 1043 (right). The underlying stellar continuum (at distance = 0′′) was subtracted using a Gaussian fit. The positions of the knots are indicated. The dashed line indicates the position of the continuum source; 0 km s-1 corresponds to the systemic velocity (see text). The remnant emission between − 30 up to 50 km s-1 is a residual of the subtraction of a telluric OH emission line.
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