OBSERVATIONS OF SO IN DARK AND MOLECULAR CLOUDS
Journal or Book Title
The 1(0)-0(1) transition of SO at 30 GHz has been observed in several sources, including the first detection of sulfur monoxide in cold dark clouds without apparent internal energy sources. The SO transition appears to be an excellent tracer of structure in dark clouds, and the data support suggestions that self-absorption is important in determining emission profiles in such regions for large line-strength transitions. Column densities estimated from a comparison of the results for the two isotopic species indicate a high fractional abundance of SO in dark clouds.
RYDBECK, OEH; Irvine, WM; HJALMARSON, A; RYDBECK, G; ELLDER, J; and KOLLBERG, E, "OBSERVATIONS OF SO IN DARK AND MOLECULAR CLOUDS" (1980). ASTROPHYSICAL JOURNAL. 294.
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