Longitude-averaged line-of-sight integration of the same exponential disc (Re, he) = (3.5, 0.1) 3D emissivity model as a function of latitude for vertical positions of 0 (symmetric, orange) and +50 pc (violet). In the symmetric case, the emission peaks at b = 0°, as expected, and already for z0 = 50 pc, the peak is shifted 3° to negative latitudes. See text for further details and implications.
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