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

A number of ultra-cool dwarfs emit circularly polarised radio waves generatedby the electron cyclotron maser instability. In the solar system such radio isemitted from regions of strong auroral magnetic field-aligned currents. We thusapply ideas developed for Jupiter's magnetosphere, being a well-studiedrotationally-dominated analogue in our solar system, to the case offast-rotating UCDs. We explain the properties of the radio emission from UCDsby showing that it would arise from the electric currents resulting from anangular velocity shear in the fast-rotating magnetic field and plasma, i.e. byan extremely powerful analogue of the process which causes Jupiter's auroras.Such a velocity gradient indicates that these bodies interact significantlywith their space environment, resulting in intense auroral emissions. Theseresults strongly suggest that auroras occur on bodies outside our solar system.

Origin of electron cyclotron maser-induced radio emissions at ultra-cool dwarfs: magnetosphere-ionosphere coupling currents