Carbon Recombination Line Observations of the Sharpless 140 Region,
OWENS VALLEY RADIO OBSERVATORY PASADENA CALIF
Pagination or Media Count:
Carbon recombination line emission has been detected at two frequencies from a dark cloud contiguous with the small HII region Sharpless 140. The observations show the dark cloud to be of unusually low temperature and to have a markedly inhomogeneous density distribution, with localized regions of high density surrounding one or more embedded stars. The carbon is probably ionized by photons both from the exciting star of S140 and from the embedded stars. The dark cloud and S140 apparently represent two stages of star formation which have occurred over a period of at least 500,000 years in adjacent regions of the same dark cloud.