Affiliation

Physikalisch Meteorologisches Observatorium Davos, World Radiation Center (PMOD/WRC), Switzerland

Main category

Natural Sciences (Astrophysics and Astrononmy)

Caption

Recent observations from Solar Orbiter have emphasised the importance of small and short-lived phenomena in the solar atmosphere. They have shown small extreme-ultraviolet brightenings in the solar corona, which appear very frequently. Previously, Parker Solar Probe has revealed a highly dynamic structure in the solar wind’s magnetic field, which are referred to as switchbacks. Those results raise the question of the importance of small-scale phenomena and their potential contribution to the solar wind. We have analysed 14 coronal upflows, which were derived as blue shifts in spectroscopic data and examined the potential sources for each upflow. This was done by using Hinode/EIS rasters and calculating the Doppler velocities for the Fe XII line. Events, which are stronger blue-shifted than

DOI

requested

Link this video

https://science-media.org/video/323