Detection of Si-29C2 and Si-30C2 toward IRC + 10216

Details Detection of Si-29C2 and Si-30C2 toward IRC + 10216 Detection of Si-29C2 and Si-30C2 toward IRC + 10216

Oct 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986a%26a...167l...9c&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 167, Oct. 1986, p. L9-L12.

Astronomy and Astrophysics

Astronomy

27

Molecular Spectra, Silicon Carbides, Silicon Isotopes, Stellar Envelopes, Abundance, Astronomical Spectroscopy, Infrared Sources (Astronomy), Millimeter Waves, Molecular Rotation

Scientific paper

Six new lines in the millimetre spectrum of IRC +10216 have been observed at the frequencies predicted for the 404→303, 423→322, and 422→321 transitions of 29SiC2 and 30SiC2. The predictions are based on the geometrical structure of SiC2 derived by Thaddeus et al. (1984). The result definitely confirms the identification of this species in IRC +10216. The authors find abundance ratios between the three silicon isotopes which are very close to the terrestrial elemental isotopic ratios.

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