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Fig. 4.

image

Schematic visualization of three commonly adopted outflow histories and their effects on radial density profile and conversion from outflow mass to outflow rate. From left to right panels: (i) outflow history, (ii) average radial density profile (local cloud conditions may differ from this average), (iii) a simulated moment-zero map for a modest 20° half opening angle flow seen with flow axis inclined by 60° with respect to the line of sight, and (iv) the equation for conversion from outflow mass to outflow rate. From top to bottom: (a) constant outflow history, (b) constant average volume density in cone, requiring a decaying outflow history, and (c) thin outflowing shell.

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