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Table 1

Input parameter values adopted for the grid of radiation transfer models of spherically expanding shells.

Parameter Values n

vexp 0., 20., 50., 100., 150., 200., 250., 300., 400., 500., 600., 700. 12
log (NHI) 16., 18., 18.5, 19., 19.3, 19.6, 19.9, 20.2, 20.5, 20.8, 21.1, 21.4, 21.7 13
b 10., 20., 40., 80., 160. 5
τa 0., 0.2, 0.5, 1., 1.5, 2., 3., 4. 8

Notes. All combinations of parameters have been computed, corresponding to 6240 models in total. The units are the following: vexp and b in km s-1, NHI in cm-2. τa is dimensionless. By symmetry of the problem, the models also describe spherical infall, in which case the infall velocity is v =  −vexp.

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