M 33 map of the total far-infrared (TIR) continuum in color together with [C II] contours, both at 12″ resolution. TIR units are erg s−1 cm−2 sr−1. [C II] contours are 3.4, 7.4, 16.0, 33.6, 73.0 in units of 10−6 erg s−1 cm−2 sr−1. A polygon marks the outer edges of the regions mapped in [C II]. Coordinates are in RA and Dec (eq. J2000). The nucleus at 1:33:50.9, 30:39:35.8 (J2000) (Skrutskie et al. 2006) is marked, together with a few prominent giant H II regions. Ellipses delineate galacto-centric distances of 2, 4, and 6 kpc.
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