Power in the 8.6 GHz radio band in function of the 3–9 keV X-ray power (both in Eddington luminosity). Black solid lines are for constant transition radius r_J, while the color background shows the accretion rate ṁ_in. This figure has been made using a similar procedure to that used to make Fig. 5. The black points are the observed values for GX 339–4 during its cycles between 2003 and 2011. A possible theoretical jet line has been drawn in red (see Sect. 4.3).