SIMBAD references

2017MNRAS.467.3848D - Mon. Not. R. Astron. Soc., 467, 3848-3855 (2017/June-1)

Analysis of carbon monoxide absorption at zabs ~= 2.5 to constrain variation of the proton-to-electron mass ratio.

DAPRA M., NOTERDAEME P., VONK M., MURPHY M.T. and UBACHS W.

Abstract (from CDS):

Absorption by carbon monoxide in the spectrum of quasar SDSS J000015.16+004833.2 is investigated in order to derive a constraint on the temporal variation of the proton-to-electron mass ratio, µ. The spectrum was recorded using Very Large Telescope/Ultraviolet and Visual Echelle Spectrograph, and it was partially corrected for long-range wavelength scale distortions using the supercalibration technique. Eight vibrational CO singlet-singlet bands belonging to the A1Π-X1Σ+ electronic absorption system, and the perturbing d3Δ-X1Σ+(5, 0) singlet-triplet band are detected in the damped Lyman α system at zabs ≃ 2.52. The spectra are modelled using a comprehensive fitting technique, resulting in a final value of Δµ/µ = (1.8 ± 2.2stat ± 0.4syst) x 10–5, which is consistent with no variation over a look-back time of ∼11.2 Gyr.

Abstract Copyright: © 2017 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): methods: data analysis - quasars: absorption lines - quasars: individual: J0000+0048 - cosmology: observations - cosmology: observations

Simbad objects: 10

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2019.09.16-04:53:21

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