On the quasi-three dimensional configuration of magnetic clouds

Abstract

We develop an optimization approach to model the magnetic field configuration of magnetic clouds, based on a linear-force free formulation in three dimensions. Such a solution, dubbed the Freidberg solution, is kin to the axi-symmetric Lundquist solution, but with more general "helical symmetry". The merit of our approach is demonstrated via its application to two case studies of in-situ measured magnetic clouds. Both yield results of reduced ${\chi }^2\approx 1$. Case 1 shows a winding flux rope configuration with one major polarity. Case 2 exhibits a double-helix configuration with two flux bundles winding around each other and rooted on regions of mixed polarities. This study demonstrates the three-dimensional complexity of the magnetic cloud structures.

arXiv commentSubmitted to ApJL on Aug 24, 2020; rejected by Editor without review... Resubmitted to GRL, in press (see DOI; Open Access)

References in corpus (6)

• How Many CMEs Have Flux Ropes? Deciphering the Signatures of Shocks, Flux Ropes, and Prominences in Coronagraph Observations of CMEs
• Structures of Interplanetary Magnetic Flux Ropes and Comparison with Their Solar Sources
• On the twists of interplanetary magnetic flux ropes observed at 1 AU
• A Study of Pre-Flare Solar Coronal Magnetic Fields: Magnetic Flux Ropes
• Evolution of A Magnetic Flux Rope toward Eruption
• How Does Magnetic Reconnection Drive the Early Stage Evolution of Coronal Mass Ejections?

Cited by in corpus (4)

• Internal Structure of the 2019 April 2 CME
• Quantitative Characterization of Magnetic Flux Rope Properties for Two Solar Eruption Events
• Optimal Fitting of the Freidberg Solution to In Situ Spacecraft Measurements of Magnetic Clouds
• Validation and interpretation of three-dimensional configuration of a magnetic cloud flux rope