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

Stereoscopic white-light imaging of a large portion of the inner heliospherehas been used to track interplanetary coronal mass ejections. At largeelongations from the Sun, the white-light brightness depends on both the localelectron density and the efficiency of the Thomson-scattering process. Toquantify the effects of the Thomson-scattering geometry, we study aninterplanetary shock using forward magnetohydrodynamic simulation and syntheticwhite-light imaging. Identifiable as an inclined streak of enhanced brightnessin a time-elongation map, the travelling shock can be readily imaged by anobserver located within a wide range of longitudes in the ecliptic. Differentparts of the shock front contribute to the imaged brightness pattern viewed byobservers at different longitudes. Moreover, even for an observer located at afixed longitude, a different part of the shock front will contribute to theimaged brightness at any given time. The observed brightness within eachimaging pixel results from a weighted integral along its correspondingray-path. It is possible to infer the longitudinal location of the shock fromthe brightness pattern in an optical sky map, based on the east-west asymmetryin its brightness and degree of polarization. Therefore, measurement of theinterplanetary polarized brightness could significantly reduce the ambiguity inperforming three-dimensional reconstruction of local electron density fromwhite-light imaging.

solar physics

Effects of Thomson-Scattering Geometry on White-Light Imaging of an  Interplanetary Shock: Synthetic Observations from Forward Magnetohydrodynamic  Modelling