Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 1974
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1974a%26a....34..479r&link_type=abstract
Astronomy and Astrophysics, vol. 34, no. 3, Sept. 1974, p. 479-482. Research supported by the Swedish Natural Science Research
Astronomy and Astrophysics
Astronomy
19
Electron Transitions, Free Radicals, Ground State, Interstellar Matter, Molecular Spectra, Radio Astronomy, Cassiopeia A, Radio Spectroscopy, Spectrum Analysis, Transition Probabilities
Scientific paper
From a comparison of the spectra of CH and other molecules toward the continuum source Cas A and four dark clouds, the ground state transition frequencies of CH have been determined and are reported. The relative errors in these frequencies are about twice as small as those obtained earlier by radio astronomical methods for the two main lines of ground state OH.
Ellder Joel
Hjalmarson Å..
Irvine William M.
Rydbeck E. H. O.
Sume A.
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