Observations of infrared emission lines in the southern compact H II regions G 333-6-0-2 and G 298-2-0-3
Summary. Observations of three infrared fine-structure lines and one hydrogen recombination line were made of G 333.6 - 0.2 and G 298.2 0.3, both highly obscured H ii regions whose near infrared (1 25 i'm) luminosities are among the largest known. Line strengths for Ne ii (12.81 i'm), S iv (10.52 i'm), Ar iii(899 i'm) and Bracket a (4.05 i'm) were measured in the central, high surface-brightness regions of both sources. For most of the lines, the one-dimensional spatial distribution of the line flux in these regions was mapped. The two sources show very different states of excitation, that of G333.6 0.2 being low and that of G298.2 - 0J being much higher. The results are discussed in terms of the extinction to these objects, elemental abundances and the properties of the exciting sources.