The first near-infrared, high-resolution échelle spectroscopy of the outflow in NGC 4151 - A study of the clouds covering the Eye of Sauron

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Table 3.

Summary of the relevant physical properties of the He I outflow detected in the NGC 4151 IR spectrum.

Quantity	Value	Units
v_max	840 ± 140	km s⁻¹
r_out	$6 . 7_{- 0.7}^{+ 2.9}$ $Mathematical equation: $ 6.7^{+2.9}_{-0.7} $$	pc
Ṁ_out	$(1 . 8_{- 1.1}^{+ 0.9}) \times 10^{- 3}$ $Mathematical equation: $ \left( 1.8^{+0.9}_{-1.1} \right) \times 10^{-3} $$	M_⊙ yr⁻¹
Ė_kin	$(4 . 0_{- 2.9}^{+ 4.2}) \times 10^{38}$ $Mathematical equation: $ \left( 4.0^{+4.2}_{-2.9} \right) \times 10^{38} $$	erg s⁻¹
ṗ_out	$(9 . 6_{- 6.5}^{+ 7.2}) \times 10^{30}$ $Mathematical equation: $ \left( 9.6^{+7.2}_{-6.5} \right) \times 10^{30} $$	erg cm⁻¹

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