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

The question of the origin of the recent acceleration of the Universesexpansion is still pending. What is making the situation even worst, it isimpossible to distinguish the vast majority of the proposed models of thedynamical dark energy and modified gravity from the $\Lambda CDM$ in view ofrecent geometrical and dynamical, observational data. On the other hand onscales much smaller than the present Hubble scale, there are differences in thegrowth of the matter perturbations for different modes of the perturbations inthe $\Lambda CDM$. In the view of the new planned observations that will giveinsight into the perturbations of the dark sector this issue is being worth offurther investigation. We analyze the evolution of the dark matterperturbations in the dynamical dark energy models with the singularities, suchas the sudden future singularity and the finite scale factor singularity. Weemploy the Newtonian gauge formulation for derivation of the perturbationequations for the growth function. We abandon the sub-Hubble approximation,what leads to the scale dependent solutions for the perturbations. Treating thegrowth function as a scale dependent allows to differentiate the dynamical darkenergy models with the singularities and the dynamical dark energy models andthe $\Lambda CDM$. The new data constraining growth of the perturbations willbe able to rule out the whole range of the values of the parameters allowed bythe present data of the dynamical dark energy models with the sudden futuresingularity and the finite scale factor singularity.

Dynamical dark energy models with singularities in the view of the forthcoming results of the growth observations