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

The EDGES collaboration's observation of an anomalously strong 21 cmabsorption feature around the cosmic dawn era has energised the cosmologicalcommunity by suggesting a novel signature of dark matter in the cooling ofcosmic hydrogen. In a recent letter we have argued that by virtue of theability to mediate cooling processes whilst in the condensed phase, a smallamount of axion dark matter can explain these observations within the contextof standard models of axions and axion-like particles. These axions andaxion-like particles (ALPs) can thermalize through gravitationalself-interactions and so eventually form a Bose-Einstein condensate (BEC),whereupon large-scale long-range correlation can produce experimentallyobservable signals such as these. In this context the EDGES best-fit resultfavours an axion-like-particle mass in the (6, 400) meV range. Futureexperiments and galaxy surveys, particularly the International AxionObservatory (IAXO) and EUCLID, should have the capability to directly test thisscenario. In this paper, we will explore this mechanism in detail and give morethorough computational details of certain key points.

A detailed exploration of the EDGES 21 cm absorption anomaly and axion-induced cooling