Fig. 17

Final parametrization: full scale height. From top to bottom: in the same order as in Fig. 15, c-C3 H2 (SCHT), CH3C2H (SCHT-2) and, overlapping, c-C3H2 (SCHT-3) and H 42α (SCHT-4). The ordinate on the left-hand side shows scale height in arcseconds; the ordinate on the right-hand side denotes scale height in pc, both as a function of galactocentric radius.
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