Table 4 Input parameters and mass-loss rates for the [Fe II] 1.644 μm line

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

Knot L[Fe II] (×1032 erg s−1) ntot (×105 cm−3) v (km s−1) θmaj (arcsec) θmin (arcsec) M (×10−3 M) \({\dot{\boldsymbol{M}}}_{{\mathbf{ejec}}}\) (×10−5 M yr−1) \(\dot P\) (×10−2 M yr−1 km s −1)
K1 3.43 ± 0.69 1.5 ± 0.7 150 − 300a 1.5 ± 0.2 0.5 ± 0.2 1.6 ± 0.3 1.6 − 3.2 0.2−0.9
K2 0.58 ± 0.12 0.36 ± 0.1 140 ± 10 1.5 ± 0.1 0.53 ± 0.01 0.3 ± 0.1
K3 4.86 ± 0.13 3.0 ± 0.2 355 ± 10 1.7 ± 0.1 0.40 ± 0.01 2.4 ± 0.1 4.7 ± 0.3 1.8 ± 0.1
K4 9.12 ± 0.33 3.1 ± 0.2 205 ± 10 1.8 ± 0.1 0.52 ± 0.01 4.5 ± 0.2 4.9 ± 0.3 1.1 ± 0.1
  1. The source of uncertainties in Columns 4–6 is coming from measurement uncertainties, whereas in Columns 2, 3, 7–9 comes from performing the error propagation in the specific equations
  2. aAssuming a tangential velocity of 150–300 km s−1 from the proper motions of ref. 22.