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Fig. 4


H i-τ correlation plot for the southern Galactic hemisphere at b< −20°. The H i column density is the combined LVC and IVC emission between −100 km s-1vLSR ≤ +100 km s-1. The black dots show the two-component linear model consisting of LVC and IVC contributions. From this model 10 000 data points are chosen randomly and plotted.

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