Six transitions of tetratrienediylidenesilylene, also known as silapentatetraenediylidene, with J“ between 11 and 27 were detected in the circumstellar envelope of CW Leonis (IRC +10216) with the 45 m radiotelescope of the Nobeyama Radio Observatory between 36 and 86 GHz:
M. Ohishi, N. Kaifu, K. Kawaguchi, A. Murakami, S. Saito, S. Yamamoto, S.-I. Ishikawa, Y. Fujita, Y. Shiratori, and W. M. Irvine,
Detection of a new Circumstellar Carbon Chain Molecule, C<sub>4</sub>Si
Astrophys. J. 345, L83–L86 (1989).
In their work
Detection of SiC<sub>6</sub> in IRC +10216 through //Q//-band lines
Astron. Astrophys. 700, L6 (2025).
J. R. Pardo, J. P. Fonfría, M. Agúndez, B. Tercero, C. Cabezas, L. Velilla-Prieto, M. Guélin, P. de Vicente, and J. Cernicharo
reported also the secure and marginal detections of 29SiC4 and 30SiC4, respectively, by applying the 28Si/29Si and 30Si/29Si raios of 15.4 and 20.3, respectively, expected for the circumstellar envelope of CW Leonis. The observations are part of a 31.0 to 50.1 GHz line survey of this source with the 40 m Yebes telescope.
Contributor(s): H. S. P. Müller; 08, 2010; 08, 2025