Fig. 7
O IV density measurements. The theoretical intensity ratio for the O IV (λ1399.8/λ1401.2 Å) line pair as a function of electron density. The blue and red triangles represent observed densities for the spire (Ne = 2.0×1010 cm-3) and footpoint (Ne = 7.6×1010 cm-3) of the jet 4. The black vertical lines represent error bars calculated by considering 20% uncertainty.
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