A Search for Vibrationally Excited SiC_2 nu_3=1 toward IRC +10216

Details A Search for Vibrationally Excited SiC_2 nu_3=1 toward IRC +10216 A Search for Vibrationally Excited SiC_2 nu_3=1 toward IRC +10216

Dec 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997apj...490..819g&link_type=abstract

Astrophysical Journal v.490, p.819

Astronomy and Astrophysics

Astronomy

7

Radio Lines: Stars, Stars: Carbon, Stars: Circumstellar Matter, Stars: Individual Alphanumeric: Irc +10216

Scientific paper

Five rotational transitions of vibrationally excited SiC2 in the nu 3 = 1 antisymmetric mode were sought toward IRC+10216: 414-313, 515-414, 615-514, 717-616, and 735-634. All five spectra show emission features. However, the 515-414 and 735-634 transitions are noticeably lower in intensity compared to the other three. In addition, the 414-313, 615-514, and 717-616 transitions have wider line widths than expected. For these reasons, we conclude that our detection of vibrationally excited SiC2 is tentative. The ratio of column densities of vibrationally excited SiC2 to ground state SiC2 is N( nu 3 = 1)/N( nu 3 = 0) <~ 0.024.

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