Position-velocity plot of the nearby H i cloud (upper panel) and of the ionized gas (lower panel). In the ionized gas position-velocity plot, the points related to the low and the high velocity components are drawn with blue and red crosses respectively. The shadowed stripe marks the large-scale velocity gradient of the H i cloud. In order to calculate the angular distance, the zero point along the horizontal axis is assumed to be located at RA = 13^h26^m15^s and Dec = −42°49′00′′ in accordance with the position-velocity plot shown in the upper panel.