volume 13, issue S332, P261-269 2017
DOI: 10.1017/s1743921317007566
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Sarah Massalkhi, M. Agúndez, J. Cernicharo, J. P. Fonfría, M. Santander-García

Abstract: AbstractSilicon carbide dust grains are ubiquitous in circumstellar envelopes around C-rich AGB stars. However, the main gas-phase precursors leading to the formation of SiC dust have not yet been identified. To date, only three molecules containing an Si–C bond have been identified to have significant abundances in C-rich AGB stars: SiC2, SiC, and Si2C. The ring molecule SiC2 has been observed in a handful of evolved stars, while SiC and Si2C have only been detected in the C-star envelope IRC +10216. We aim t…

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