Herschel/HIFI discovery of interstellar chloronium (H${}_2$Cl${}^{+}$)

D. C. Lis, J. C. Pearson, D. A. Neufeld +102

We report the first detection of chloronium, H${}_2$Cl${}^{+}$, in the interstellar medium, using the HIFI instrument aboard the \emph{Herschel} Space Observatory. The $2_{12}-1_{01}$ li…