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 Local Group is a unique environment in which to study the astrophysics ofgalaxy formation. The proximity of the Milky Way and M31 enhances the frequencyof interactions of the low-mass halo population with more massive dark matterhaloes, which increases their concentrations and strips them of gas and othermaterial. Some low-mass haloes pass through the haloes of the Milky Way or M31and are either ejected into the field or exchanged between the two primaryhosts. We use high resolution gas-dynamical simulations to describe a new classof field haloes that passed through the haloes of both the Milky Way and M31 atearly times and are almost twice as concentrated as field haloes that do notinteract with the primary pair. These 'Hermeian' haloes are distributedanisotropically at larger distances from the Local Group barycentre than theprimary haloes and appear to cluster along the line connecting the Milky Wayand M31. Hermeian haloes facilitate the exchange of dark matter, gas, and starsbetween the Milky Way and M31 and can enhance the star formation rate of thegas in the primary haloes during their interactions with them. We also showthat some Hermeian haloes can host galaxies that, because they are embedded inhaloes that are more concentrated than regular field haloes, are promisingtargets for indirect dark matter searches beyond the Milky Way virial radiusand can produce signals that are competitive with those of some dwarf galaxies.Hermeian galaxies in the Local Group should be detectable by forthcomingwide-field imaging surveys.

Hermeian haloes: Field haloes that interacted with both the Milky Way and M31