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Fig. 1.

image

Isotropic and normalized intensity profiles I vs. the reduced frequency x, used for the evaluation of departures from the equilibrium velocity distribution for the VDF of these excited atoms, f2. We adopted different values for (i) the location of the (symmetric) peaks, and (ii) of the central reversal of each profile. These variations can also mimic some resonance lines observations that may form under different astrophysical conditions.

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