Accurate sub-millimetre rest-frequencies for HOCO${}^{+}$ and DOCO${}^{+}$ ions

Luca Bizzocchi, Valerio Lattanzi, Jacob Laas +6

HOCO${}^{+}$ is a polar molecule that represents a useful proxy for its parent molecule CO${}_2$, which is not directly observable in the cold interstellar medium. This cation has been d…