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

This article reviews the two major recent developments that significantlyimproved cosmological measurements of fundamental constants derived from highresolution quasar spectroscopy. The first one is the deployment of astronomicalLaser Frequency Combs on high resolution spectrographs and the second one isthe development of spectral analysis tools based on Artificial Intelligencemethods. The former all but eliminated the previously dominant source ofinstrumental uncertainty whereas the latter established optimal methods formeasuring the fine structure constant ($\alpha$) in quasar absorption systems.The methods can be used on data collected by the new ESPRESSO spectrograph andthe future ANDES spectrograph on the Extremely Large Telescope to produceunbiased $\Delta\alpha/\alpha$ measurements with unprecedented precision.

Methods for quasar absorption system measurements of the fine structure constant in the 2020s and beyond