Table 3 Electron density (ne) for the various knots

From: Measuring the ionisation fraction in a jet from a massive protostar

Knot

\({{n}}_{{e}}^{{\mathrm{radio}}}\,({{ \times 10}}^{{4}}\,{\mathrm{cm}}^{ - {{3}}})\)

\({{n}}_{{e}}^{{{1}}.{{664}}/{{1}}.{{644}}}\,({{ \times 10}}^{{4}}\,{\mathrm{cm}}^{ - {{3}}})\)

\({{n}}_{{e}}^{{{1}}.{{644}}/{{1}}.{{677}}}\,({{ \times 10}}^{{4}}\,{\mathrm{cm}}^{ - {{3}}})\)

K1

1.8 ± 0.1

K2

<0.35 − 0.6

<0.65

<1.0

K3

2.1 ± 0.1

2.3 ± 0.1

3.0 ± 2.0

K4

1.6 ± 0.1

3.0 ± 2.0

6.0 ± 5.0

  1. The source of uncertainties in Column 2 is coming from the error propagation calculated from Eq. (1), whereas in Columns 3 and 4 from the error propagation of the ratio of the lines together with the NLTE model