Fig. 1

Sketch of the region around the L1551 IRS 5 sources showing only a few components of the system (scales are only approximately preserved). The light gray regions indicate the jets. The inner two [Fe ii] emission knots (PHK1, PHK2) from Pyo et al. (2009) are marked, the circumbinary disk is shown in dark gray. Note that the northern optical jet might actually be driven by the southern binary component (only one counter-jet is shown). The one arcsec wide stripes are used later in the article (Sect. 4.2) and are shown here for reference.
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