Radio-wavelength observations of CH in the direction of nearby bright stars

Details Radio-wavelength observations of CH in the direction of nearby bright stars Radio-wavelength observations of CH in the direction of nearby bright stars

Jul 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981apj...247..116w&link_type=abstract

Astrophysical Journal, Part 1, vol. 247, July 1, 1981, p. 116-124. Research supported by the American Astronomical Society.

Astronomy and Astrophysics

Astronomy

23

Hydrocarbons, Interstellar Gas, Molecular Clouds, Radio Astronomy, Stellar Luminosity, Calcium, Line Spectra, Sodium, Spectral Correlation

Scientific paper

Observations of the 9 cm F = 1-1 Lambda doublet transition of the CH molecule have been made in the direction of 22 stars which lie in the vicinity of diffuse interstellar clouds. Positive detections were made toward 14 of the regions. In some cases more than one emission feature was detected. The ratio of the column densities of CH in the radio and optical spectral regions is 1.11 + or - 0.4. The velocities and widths of the CH lines differ from those of the CH(+) lines in the direction of Zeta Oph, Chi 2 Ori and Chi Oph, providing support for the theory that the CH(+) molecules are formed in a hot compressed gas produced by a passing interstellar shock wave.

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