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

Cosmological observations have revealed the existence of a dark mattersector, which is commonly assumed to be made up of one particle species only.However, this sector might be more complicated than we currently believe: theremight be more than one dark matter species (for example two components of colddark matter or a mixture of hot and cold dark matter) and there may be newinteractions between these particles. In this paper we study the possibility ofmultiple dark matter species and interactions mediated by a dark energy field.We study both the background and the perturbation evolution in these scenarios.We find that the background evolution of a system of multiple dark matterparticles (with constant couplings) mimics a single fluid with a time-varyingcoupling parameter. However, this is no longer true on the perturbative level.We study the case of attractive and repulsive forces as well as a mixture ofcold and hot dark matter particles.

New interactions in the dark sector mediated by dark energy