SIMBAD references

2020MNRAS.498.3624L - Mon. Not. R. Astron. Soc., 498, 3624-3632 (2020/November-1)

Constraints on the electron-to-proton mass ratio variation at the epoch of reionization.


Abstract (from CDS):

Far-infrared fine-structure transitions of [C I] and [C II] and rotational transitions of CO are used to probe hypothetical variations of the electron-to-proton mass ratio µ = me/mp at the epoch of reionization (z > 6). A constraint on Δµ/µ = (µobs - µlab)/µlab = (0.7 ± 1.2) x 10–5 (1σ) obtained at {bar}z = 6.31 is the most stringent up-to-date limit on the variation of µ at such high redshift. For all available estimates of Δµ/µ ranging between z = 0 and z ∼ 1100, the epoch of recombination, a regression curve Δµ/µ = kµ(1 + z)p, with kµ = (1.6 ± 0.3) x 10–8 and p = 2.00 ± 0.03, is deduced. If confirmed, this would imply a dynamical nature of dark matter/dark energy.

Abstract Copyright: © 2020 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): elementary particles - techniques: spectroscopic - quasars: individual: (J0439+1634, J2310+1855) - cosmological parameters - cosmology: observations

Simbad objects: 27

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