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 Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

One of the key issues in cosmology is to establish the nature of dark energy,and to determine whether the equation of state evolves with time. Whenestimating this from distance measurements there is a degeneracy with thematter density. We show that there exists a simple function of the dark energyequation of state and its first derivative which is independent of thisdegeneracy at all redshifts, and so is a much more robust determinant of theevolution of dark energy than just its derivative. We show that this functioncan be well determined at low redshift from supernovae using GaussianProcesses, and that this method is far superior to a variety ofparameterisations which are also subject to priors on the matter density. Thisshows that parametrised models give very biased constraints on the evolution ofdark energy.

Dodging the dark matter degeneracy while determining the dynamics of dark energy