Investigating the structure of Corotating Interaction Regions (CIRs)
It is truly an exciting times in Heliophysics! Having a multitude of spacecraft missions in different orbits is presenting opportunities to dive deeper into unraveling mysteries of large scale structures in the solar wind. Corotating Interaction Regions (CIRs) form in the solar wind when high speed solar wind from coronal holes overtake slower solar wind ahead of them. As this happens a sharp increase in the solar wind forms, which compresses the solar wind, and can accelerate particles. A fortuitous alignment between Parker Solar Probe (PSP) and STEREO-A (STA) allows us to study the structure of a corotating interaction region at both 0.5 au and 1 au (the distance of Earth from the Sun). These types of multi-spacecraft observations are allowing us to dive into these structures like never before! And, to start the year off in fashion, you can read more about it in our newly published Geophysical Research Letters article.