In colors, the Spitzer-IRAC 8 μm emission from small dust (Ginard et al. 2012). In contours, the integrated emission between 5 and 15 km s^-1of the C¹⁸O 2–1 line (Pilleri et al. 2012a). Green squares show the two positions analyzed in this paper. Black stars show the positions of the brightest infrared sources, following the nomenclature of Henning et al. (1992). The beams at 3 mm (~29″) and 2 mm (~16″) toward the IF and MP2 positions are drawn.