English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

Absorption by carbon monoxide in the spectrum of quasar SDSSJ000015.16+004833.2 is investigated in order to derive a constraint on thetemporal variation of the proton-to-electron mass ratio, mu. The spectrum wasrecorded using VLT/UVES, and it was partially corrected for long-rangewavelength scale distortions using the supercalibration technique. Eightvibrational CO singlet-singlet bands belonging to the A-X electronic absorptionsystem, and the perturbing d3-X(5, 0) singlet-triplet band are detected in thedamped Lyman-alpha system at z =2.52. The spectra are modelled using acomprehensive fitting technique, resulting in a final value of Dmu/mu=(1.8 +/-2.2 +/- 0.4)x10e(-5), which is consistent with no variation over a look-backtime of 11.2 Gyrs.

Analysis of carbon monoxied absorption at z=2.5 to constrain variation of the proton-to-electron mass ratio