Anomalous phosphine sensitivity coefficients as probes for a possible variation of the proton-to-electron mass ratio

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F18%3A10384684" target="_blank" >RIV/00216208:11320/18:10384684 - isvavai.cz</a>
Alternative codes found
RIV/61388963:_____/18:00489640
Result on the web
<a href="https://doi.org/10.1093/mnras/stx2696" target="_blank" >https://doi.org/10.1093/mnras/stx2696</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1093/mnras/stx2696" target="_blank" >10.1093/mnras/stx2696</a>

Result language
angličtina
Original language name
Anomalous phosphine sensitivity coefficients as probes for a possible variation of the proton-to-electron mass ratio
Original language description
A robust variational approach is used to investigate the sensitivity of the rotation-vibration spectrum of phosphine (PH3) to a possible cosmological variation of the proton-to-electron mass ratio, mu. Whilst the majority of computed sensitivity coefficients, T, involving the lowlying vibrational states acquire the expected values of T approximate to -1 and T approximate to -1/ 2 for rotational and ro-vibrational transitions, respectively, anomalous sensitivities are uncovered for the A(1) - A(2) splittings in the nu(2)/nu(4), nu(1)/nu(3) and 2 nu(l= 0)(4)/2 nu(l=2)(4) manifolds of PH3. A pronounced Coriolis interaction between these states in conjunction with accidentally degenerate A(1) and A(2) energy levels produces a series of enhanced sensitivity coefficients. Phosphine is expected to occur in a number of different astrophysical environments and has potential for investigating a drifting constant. Furthermore, the displayed behaviour hints at a wider trend in molecules of C-3v(M) symmetry, thus demonstrating that the splittings induced by higher-order ro-vibrational interactions are well suited for probing mu in other symmetric top molecules in space, since these low-frequency transitions can be straightforwardly detected by radio telescopes.
Czech name
—
Czech description
—

Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
10308 - Astronomy (including astrophysics,space science)

Project
<a href="/en/project/GA15-10267S" target="_blank" >GA15-10267S: Molecular processes in the Universe</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2018
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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