Rotational excitation of SiC${}_6$ by collisions with helium: cross sections, rate coefficients and non-LTE modeling

Liman Tian, Ziyu Xiang, Chuangang Ning +1

Rotational transitions of SiC${}_6$ in the $j=26$--$40$ range have been detected in IRC+10216, yet collisional rate coefficients for SiC${}_6$ with He or H${}_2$ were previously unavaila…