Speaker
Description
First Name: Victoria
Last Name: Thompson
Affiliation: Northumbria University
All Authors: Victoria Thompson, Nathaniel Edward-Inatimi, Vasanth Anandan, Tristan Vergé, Stephanie Yardley, Adam Finley, Robert Wicks, Deborah Baker
Abstract: In recent years, Solar Orbiter (SO) and Parker Solar Probe (PSP) have provided critical measurements from the inner heliosphere, revealing small-scale variabilities of the solar wind that are often lost at large distances. These features of the solar wind are essential for tracing the solar wind to its origin regions. Connecting the in-situ measurements from SO and PSP, with their remote sensing observations and complementary spacecraft, is crucial to developing our understanding of the solar wind origins. This work utilised a unique data set from the Fast Wind Solar Orbiter Observing Plan in March/April 2025. During this period, SO, PSP and Earth encountered a fast wind stream from an extended Southern coronal hole and SO performed its first latitudinal scan of this feature. To connect the in-situ measurements from SO we used a heliospheric upwind extrapolation with time-dependence model (HUXt) in combination with the potential field source surface model to backmap SO’s positions to the solar surface. We identified a period with high probability of connectivity to the coronal hole leading edge and quantified the combined uncertainty in connectivity from these models. Analysis of remote sensing observations and the expansion of this region is shown in addition to complementary observations from Hinode, in which initial work indicates this to be a large upflow region.