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A study of the nebulae S 206 and S 209
Radio-continuum maps, radio recombination, and H2CO as well as H Iabsorption-line measurements are presented for the optically visiblenebulae S 206 (NGC 1491) and S 209 as well as for the neighboring radiosource NRAO 150. Distances to the nebulae and physical parameters areobtained. Negative results from the formaldehyde observations suggestthat there is no molecular cloud associated with these nebulae.
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