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

Parker Solar Probe (PSP) data recorded within a heliocentric radial distanceof 0.3 AU have revealed a magnetic field dominated by Alfv\'enic structuresthat undergo large local variations or even reversals of the radial magneticfield. They are called magnetic switchbacks, they are consistent with folds inmagnetic field lines within a same magnetic sector, and are associated withvelocity spikes during an otherwise calmer background. They are thought tooriginate either in the low solar atmosphere through magnetic reconnectionprocesses, or result from the evolution of turbulence or velocity shears in theexpanding solar wind. In this work, we investigate the temporal and spatialcharacteristic scales of magnetic switchback patches. We define switchbacks asa deviation from the nominal Parker spiral direction and detect themautomatically for PSP encounters 1, 2, 4 and 5. We focus in particular on a5.1-day interval dominated by switchbacks during E5. We perform a wavelettransform of the solid angle between the magnetic field and the Parker spiraland find periodic spatial modulations with two distinct wavelengths,respectively consistent with solar granulation and supergranulation scales. Inaddition we find that switchback occurrence and spectral properties seem todepend on the source region of the solar wind rather than on the radialdistance of PSP. These results suggest that switchbacks are formed in the lowcorona and modulated by the solar surface convection pattern.

Characteristic scales of magnetic switchback patches near the Sun and their possible association with solar supergranulation and granulation