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Published online by Cambridge University Press: 04 August 2017
The distribution of CH in the Galaxy has been investigated via its main-line transition in the 2Π1/2, J=1/2 ground-state Λ-doublet at 3335 MHz. The galactic plane was observed with a spacing between adjacent points of 2°.5 in the longitude ranges 10°-60° and 310°-350°. The northern data (Johansson, 1979) were obtained with the 25.6-m telescope of the Onsala Space Observatory and the southern data with the Parkes 64-m antenna; the corresponding beamwidths are 15′ and , respectively.