Accurate Prediction of the Ammonia Probes of a Variable Proton-to-Electron Mass Ratio

Abstract

A comprehensive study of the mass sensitivity of the vibration-rotation-inversion transitions of ${}^{14}$NH${}_3$, ${}^{15}$NH${}_3$, ${}^{14}$ND${}_3$, and ${}^{15}$ND${}_3$ is carried out variationally using the TROVE approach. Variational calculations are robust and accurate, offering a new way to compute sensitivity coefficients. Particular attention is paid to the $\Delta k=\pm 3$ transitions between the accidentally coinciding rotation-inversion energy levels of the ${\nu }_2=0^{+},0^{-},1^{+}$ and $1^{-}$ states, and the inversion transitions in the ${\nu }_4=1$ state affected by the "giant" $l$-type doubling effect. These transitions exhibit highly anomalous sensitivities, thus appearing as promising probes of a possible cosmological variation of the proton-to-electron mass ratio $\mu$. Moreover, a simultaneous comparison of the calculated sensitivities reveals a sizeable isotopic dependence which could aid an exclusive ammonia detection.

arXiv comment18 pages, 2 figures, 10 tables

References in corpus (24)

• A Dust-Obscured Massive Maximum-Starburst Galaxy at a Redshift of 6.34
• A variationally computed line list for hot NH3
• 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
• Constraining changes in the proton-electron mass ratio with inversion and rotational lines
• Robust Constraint on a Drifting Proton-to-Electron Mass Ratio at z=0.89 from Methanol Observation at Three Radio Telescopes
• The density, the cosmic microwave background, and the proton-to-electron mass ratio in a cloud at redshift 0.9
• Methanol as a tracer of fundamental constants
• Perspective: Tipping the scales - search for drifting constants from molecular spectra
• Nitrogen hydrides in interstellar gas: Herschel/HIFI observations towards G10.6-0.4 (W31C)
• Detection of Widespread Hot Ammonia in the Galactic Center
• Searching for chameleon-like scalar fields with the ammonia method
• Searching for chameleon-like scalar fields with the ammonia method. II. Mapping of cold molecular cores in NH3 and HC3N lines
• A theoretical room-temperature line list for 15NH3
• The detection of the (J,K)=(18,18) line of NH3
• Submillimeter water and ammonia absorption by the peculiar z~0.89 interstellar medium in the gravitational lens of the PKS 1830-211 system
• Composition-dependent long range forces from varying m_p/m_e
• Limits on the spatial variations of the electron-to-proton mass ratio in the Galactic plane
• Preparation of an ultra-cold sample of ammonia molecules for precision measurements
• Widespread Rotationally-Hot Hydronium Ion in the Galactic Interstellar Medium
• Stringent bounds to spatial variations of the electron-to-proton mass ratio in the Milky Way
• Sensitivity of the isotopologues of hydronium to variation of the electron-to-proton mass ratio
• Sensitivity of microwave spectra of deuterated ammonia to variation of electron-to-proton mass ratio
• Sensitivity of Tunneling-Rotational Transitions in Ethylene Glycol to Variation of Electron-to-Proton Mass Ratio

Cited by in corpus (10)

• The ExoMol database: molecular line lists for exoplanet and other hot atmospheres
• Symmetry adapted ro-vibrational basis functions for variational nuclear motion calculations: TROVE approach
• Perspective: Accurate ro-vibrational calculations on small molecules
• The rotation-vibration spectrum of methyl fluoride from first principles
• Enhanced sensitivity to a possible variation of the proton-to-electron mass ratio in ammonia
• Accurate prediction of H${}_3$O${}^{+}$ and D${}_3$O${}^{+}$ sensitivity coefficients to probe a variable proton-to-electron mass ratio
• Diatomic rovibronic transitions as potential probes for proton-to-electron mass ratio across cosmological time
• Hyperfine-resolved rotation-vibration line list of ammonia (NH${}_3$)
• Anomalous phosphine sensitivity coefficients as probes for a possible variation of the proton-to-electron mass ratio
• Transformation Properties under the Operations of the Molecular Symmetry Groups $G_{36}$ and $G_{36}\text{(EM)}$ of Ethane ${\text{H}}_3{\text{CCH}}_3$