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

Kód výsledku v 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>

Nalezeny alternativní kódy

RIV/61388963:_____/18:00489640

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10308 - Astronomy (including astrophysics,space science)

Projekt

<a href="/cs/project/GA15-10267S" target="_blank" >GA15-10267S: Molekulární procesy ve vesmíru</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2018

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Monthly Notices of the Royal Astronomical Society

ISSN

0035-8711

e-ISSN

—

Svazek periodika

473

Číslo periodika v rámci svazku

4

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

7

Strana od-do

4986-4992

Kód UT WoS článku

000424117300051

EID výsledku v databázi Scopus

2-s2.0-85045884458