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/

Zendy Open

Presents the pdf analysis as premium feature

PDF Analysis

Insights

Presents the summarisation as premium feature

Summarisation

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the zaia usage as premium feature

ZAIA

Zendy Tools

Zendy Plus

Presents the access of premium content as premium feature

Premium Content

We identify multiple periodic dusty structures in Saturn's Roche Division, afaint region spanning the $\sim3000$ km between the A and F rings. Thelocations and extent of these features vary over Cassini's tour of the Saturnsystem, being visible in 2006 and 2016-2017, but not in 2012-2014. Thesechanges can be correlated with variations in Saturn's magnetospheric periods.In 2006 and 2016-2017, one of the drifting magnetospheric periods would producea 3:4 resonance within the Roche Division, but in 2012-2014 these resonanceswould move into the A ring as the magnetospheric periods converged. A simplemodel of magnetic perturbations indicates that the magnetic field oscillationsresponsible for these structures have amplitudes of a few nanotesla, comparableto the magnetic field oscillation amplitudes of planetary period oscillationsmeasured by the magnetometer onboard Cassini. However, some previouslyunnoticed features at higher radii have expected pattern speeds that are muchslower than the magnetospheric periodicities. These structures may reflect anunexpectedly long-range propagation of resonant perturbations within dustyrings.

Seasonal structures in Saturn's dusty Roche Division correspond to periodicities of the planet's magnetosphere