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Fig. 20

image

Comparison of derived n(H2) contours with the SFR (left) and fPAH (right) images. In both figures, the contours for n(H2) are spaced by 400 cm-3, with the red and dark blue colors correspond to the highest (2800 cm-3) and lowest (400 cm-3) values. The two crosses in the left figure indicate the locations for the optical nucleus (magenta) and the young (age 3 Myr) star clusters (blue). The values of fPAH in the right figure are normalized by the Galactic value, which is 4.6% (see Sect. 3.2).

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