Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981jchph..74.6990f&link_type=abstract
Journal of Chemical Physics, vol. 74, June 15, 1981, p. 6990, 6991.
Astronomy and Astrophysics
Astronomy
26
Carbon Monoxide, Hyperfine Structure, Interstellar Gas, Molecular Spectra, Oxygen 17, Radio Astronomy, Cassegrain Antennas, Energy Levels, Line Spectra
Scientific paper
It is pointed out that the isotope of carbon monoxide, CO-17, has appreciable hyperfine structure caused by the electric quadrupole and the magnetic dipole interactions of the O-17 nucleus which has a spin of 5/3. During a radioastronomical study of the structure and dynamics of cold interstellar clouds, it was found that the Bok globule B335 had an extremely small velocity dispersion such that the hyperfine components are clearly resolved. A graph is provided which shows the antenna temperature (a measure of intensity) of the CO-17 emission as a function of frequency. The hyperfine constants and line frequencies were redetermined for the CO-17 J=1 yields 0 rational transition. The observation of CO-17 was carried out with a 7 meter Cassegrain antenna during 1979 and 1980. The CO-17 molecular line parameters are listed in a table.
Frerking Margaret A.
Langer William D.
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