Sensitivity of the isotopologues of hydronium to variation of the electron-to-proton mass ratio

Abstract

We study the sensitivity of the microwave and submillimeter transitions of the isotopologues of hydronium to the variation of the electron-to-proton mass ratio mu. These sensitivities are enhanced for the low frequency mixed inversion-rotational transitions. The lowest frequency transition (6.6 GHz) takes place for isotopologue H2DO+ and respective sensitivity to mu-variation is close to 200. This is about two orders of magnitude larger than the sensitivity of the inversion transition in ammonia, which is currently used for the search of mu-variation in astrophysics.

6 pages; v2: references corrected

References in corpus (6)

• Strong Limit on a Variable Proton-to-Electron Mass Ratio from Molecules in the Distant Universe
• Enhanced sensitivity to time-variation of m_p/m_e in the inversion spectrum of ammonia
• APEX mapping of H3O+ in the Sgr B2 region
• $\Lambda$-doublet spectra of diatomic radicals and their dependence on fundamental constants
• Stringent bounds to spatial variations of the electron-to-proton mass ratio in the Milky Way
• Sensitivity of the H3O+ inversion-rotational spectrum to changes in m_e/m_p

Cited by in corpus (3)

• Accurate Prediction of the Ammonia Probes of a Variable Proton-to-Electron Mass Ratio
• Linear polyatomic molecules with Π ground state: sensitivity to variation of the fundamental constants
• Diatomic rovibronic transitions as potential probes for proton-to-electron mass ratio across cosmological time