Astonomical and laboratory detection of the SiC radical

Details Astonomical and laboratory detection of the SiC radical Astonomical and laboratory detection of the SiC radical

Jun 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989apj...341l..25c&link_type=abstract

Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 341, June 1, 1989, p. L25-L28.

Astronomy and Astrophysics

Astronomy

115

Free Radicals, Interstellar Chemistry, Radio Astronomy, Silicon Carbides, Stellar Envelopes, Electron States, Fine Structure, Ground State, Molecular Rotation, Spectrum Analysis

Scientific paper

Laboratory and space observations of a number of mm-wave rotation lines in the previously unobserved 3Pi electronic ground state of the SiC radical are discussed. Laboratory-derived frequencies, accurate to better than 0.1 ppm, are used to obtain a highly precise determination of the fine structure, rotational, centrifugal distortion, and Lambda-doubling constants of the SiC ground state. It is found that SiC is appreciably extended toward IRC+10216, with a diameter of at least 54 arcsec.

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