Fig. 1.
Illustration of the general concept for measuring a variation of the fine-structure constant from a fiducial metal absorption systems at zabs = 1.7 in a quasar spectrum. The assumed change of Δα/α by 5 ppm leads to differential line shifts, indicated by the arrows. For visibility, the magnitude of the shifts is exaggerated by ×105.
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.