Radio continuum and H92α recombination line observations of G34.26+0.15 and G5.89-0.39

We report, VLA observations of 8.3 GHz continuum and H92alpha radio recombination line towards the star forming regions G34.26+0.15 and G5.89 0.39. Both regions show considerable mean optical depth in the continuum at 8.3 GHz, tau(c) similar or equal to 2 and the H92a line can be used to study opacity variations across the face of the nebula. We detected H92a emission in the ultracompact component A of G34.26+0.15., but not in the ultracompact component B. This result is puzzling since both ultracompact. components are similar in continuum flux density and angular size. C5.89-0.39 shows strong velocity gradients in the H92alpha, line, but these cannot be attributed only to rotation, as previously proposed.