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 Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

We study some of the effects that magnetic turbulent fluctuations have on thedynamics of pickup O+ ions in the magnetic polar regions of the Marsionosheath. In particular we study their effect on the bulk velocity profilesof ions as a function of altitude over the magnetic poles, in order to comparethem with recent Mars Express data; that indicate that their average velocityis very low and essentially in the anti-sunward direction. We find that, whilemagnetic field fluctuations do give rise to deviations from simple ExB-driftgyromotion, even fluctuation amplitudes much greater than those of in situmeasurements are {\it not} able to reproduce the vertical velocity profile ofO+ ions. We conclude that other physical mechanisms, different from a purecharged particle dynamics, are acting on pickup ions at the Martian terminator.A possibility being a viscous-like interaction between the Solar Wind and theMartian ionosphere at low altitudes.

Effects of Magnetic Turbulence on the Dynamics of Pickup Ions in the Ionosheath of Mars