Matching temporal signatures of solar features to their corresponding solar wind outflows

Abstract

The role of small-scale coronal eruptive phenomena in the generation and heating of the solar wind remains an open question. Here, we investigate the role played by coronal jets in forming the solar wind by testing whether temporal variations associated with jetting in EUV intensity can be identified in the outflowing solar wind plasma. This type of comparison is challenging due to inherent differences between remote-sensing observations of the source and in situ observations of the outflowing plasma, as well as travel time and evolution of the solar wind throughout the heliosphere. To overcome these, we propose a novel algorithm combining signal filtering, two-step solar wind ballistic backmapping, window shifting, and Empirical Mode Decomposition. We first validate the method using synthetic data, before applying it to measurements from the Solar Dynamics Observatory, and Wind spacecraft. The algorithm enables the direct comparison of remote sensing observations of eruptive phenomena in the corona to in situ measurements of solar wind parameters, among other potential uses. After application to these datasets, we find several time windows where signatures of dynamics found in the corona are embedded in the solar wind stream, at a time significantly earlier than expected from simple ballistic backmapping, with the best performing in situ parameter being the solar wind mass flux.

References in corpus (13)

• The Astropy Project: Building an inclusive, open-science project and status of the v2.0 core package
• The Solar Orbiter mission -- Science overview
• Solar Coronal Jets: Observations, Theory, and Modeling
• Magnetic connectivity of the ecliptic plane within 0.5 AU : PFSS modeling of the first PSP encounter
• Magnetic field kinks and folds in the solar wind
• A multiple flux-tube solar wind model
• Coronal-Jet-Producing Minifilament Eruptions as a Possible Source of Parker Solar Probe (PSP) Switchbacks
• Multiwavelength Study of Equatorial Coronal-Hole Jets
• Relating streamer flows to density and magnetic structures at the Parker Solar Probe
• Measuring the magnetic field of a trans-equatorial loop system using coronal seismology
• The origin of slow Alfvénic solar wind at solar minimum
• Polarised kink waves in magnetic elements: evidence for chromospheric helical waves
• Directly comparing coronal and solar wind elemental fractionation

Cited by in corpus (2)

• Linking the Sun to the Heliosphere Using Composition Data and Modelling. A Test Case with a Coronal Jet
• Novel data analysis techniques in coronal seismology