Rotational Excitation of HC${}_5$NH${}^{+}$ by He: Collision Dynamics and Astrophysical Applications

Ziyu Xiang, Liman Tian, Tong Sun +3

The protonated cyanopolyyne HC${}_5$NH${}^{+}$ is an interstellar molecular ion of astrochemical interest, and understanding its rotational excitation is essential for interpreting its e…