To date, 204 individual molecular species, comprised of 16 different elements, have been
detected in the interstellar and circumstellar medium by astronomical observations. These …

To date, 241 individual molecular species, composed of 19 different elements, have been
detected in the interstellar and circumstellar medium by astronomical observations. These …

Rotational action spectroscopy is an experimental method in which rotational spectra of
molecules, typically in the microwave to sub-mm-wave domain of the electromagnetic …

Molecular ions have long been considered key intermediates in the evolution of molecular
complexity in the interstellar medium. However, owing to their reactivity and transient nature …

Context. Carbon chemistry plays a pivotal role in the interstellar medium (ISM) but even the
synthesis of the simplest hydrocarbons and how they relate to polycyclic aromatic …

We report the discovery of the C 5 H+ cation toward TMC-1 with the QUIJOTE line survey.
Four lines from J= 7− 6 up to J= 10− 9 have been identified in perfect harmonic frequency …

Context. Prior to star formation, pre-stellar cores accumulate matter towards the centre. As a
consequence, their central density increases while the temperature decreases …

The rotational spectrum of l–C 3 H+ has been measured in the millimeter-wave band in a 4
K cryogenic ion trap apparatus employing a novel mass-selective action spectroscopy …

We report the detection of linear and cyclic isomers of C3H and C3H2 towards various
starless cores and review the corresponding chemical pathways involving neutral (C3H x …

We report the first gas-phase vibrational spectra of the hydrocarbon ions C3H+ and C3H2+.
The ions were produced by electron impact ionization of allene. Vibrational spectra of the …