Infrared studies of H II regions and OH sources.

Abstract

This paper presents the observational results of a high spatial-resolution mapping and photo-metric study in the wavelength range 1.65 < A < 20 /x of four H n regions and seven OH sources. Infrared emission indicative of the presence of heated dust was found from the compact H n condensations in W51, DR 21, and NGC 7538. Infrared emission was also found from the positions of maser sources in NGC 7538, W75 (N), W75 (S) and Sharpless 269, but not from that in W51. An extended infrared source was found coincident with the peculiar OH source OH 0739-14.