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

There are multiple groups of comoving stars in the Solar neighbourhood, whichcan potentially be explained as the signatures of one of the fundamentalresonances of non-axisymmetric structure such as the Galactic bar or spiralarms. One such stream, Hercules, has been proposed to result from the outerLindblad resonance (OLR) of a short fast rotating bar as shown analytically, orthe corotation resonance (CR) of a longer slower rotating bar as observed in anN-body model. We show that by including an m = 4 Fourier component in ananalytical long bar model, with an amplitude that is typical for bars in N-bodysimulations, we can reproduce a Hercules like feature in the kinematics of theSolar neighbourhood. We then describe the expected symmetry in the velocitydistribution arising from such a model, which we will soon be able to test withGaia.

The 4:1 Outer Lindblad Resonance of a long slow bar as a potential explanation for the Hercules stream