Table 2
Parameters for the modeling of the OH outflow.
Parameter | Units | Meaning | Explored range (HVC) |
|
|||
R int | pc | Radius of the far-IR continuum sourcea | e |
T dust | K | Dust temperature of the far-IR continuum source | 90−200 |
τ 100 | Continuum optical depth at 100 μm along a radial (Rint) path | 0.5−4 | |
Rout/Rint | Radius of the outflowing envelope relative to Rint | 1.1−2.5f | |
v int | km s-1 | Gas velocity at Rintb,c | 1300−1700g |
v out | km s-1 | Gas velocity at Routb,c | 100−400g |
N OH | cm-2 | OH column density from Rint to Routb,c | (0.5−5) × 1017 |
p f | pc | Limiting impact parameter for the calculation of emerging fluxes | Rint − Routh |
f | Scaling factor d |
Notes.
A uniform velocity gradient is adopted, so that the velocity field is given by v(r) = vint + dv/dr (r − Rint).
Representing either partial coverage by OH of the continuum source (a clumpy
outflow, f < 1), or an ensemble of
independent sources (f > 1).
Ṁ scales as .
f is not a fitting parameter, but indicates that the modeled
source size is effective. Nevertheless, we argue in Sect. 4 that f ~ 1 for the QC, and in Sect. 3.3.1 that f ≳ 0.45 for the
HVC.
See Fig. 11.
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