Astronomical Detection of Rhomboidal SIC_3

Details Astronomical Detection of Rhomboidal SIC_3 Astronomical Detection of Rhomboidal SIC_3

May 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999apj...516l.103a&link_type=abstract

The Astrophysical Journal, Volume 516, Issue 2, pp. L103-L106.

Astronomy and Astrophysics

Astronomy

43

Ism: Molecules, Line: Identification, Molecular Data, Molecular Processes, Radio Lines: Ism

Scientific paper

Seven rotational transitions of SiC_3, a planar, highly polar ring molecule, have been detected in the millimeter-wave band in the expanding envelope of the evolved carbon star IRC +10216. On the assumption that SiC_3 has the same 40" diameter shell as SiCC, the mean column density of SiC_3 is 4.3x10^12 cm^-2. The rotational excitation of SiC_3 is similar to that of SiCC, with a low rotational temperature within the K-stacks of 10-20 K and a high rotational temperature across the K-stacks of roughly 50 K, which is probably close to the kinetic temperature of the shell.

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