Generalization of Elliptical-Cylindrical Flux Rope Models for ICME Reconstruction

TL;DR

This paper introduces a generalized elliptical cylindrical flux rope model for ICMEs that includes a non-zero poloidal component, improving fit accuracy and physical realism in magnetic field reconstruction from spacecraft data.

Contribution

The paper develops a new flux rope model with a non-zero poloidal component and a two-step reconstruction algorithm, enhancing ICME magnetic field modeling accuracy.

Findings

Better fit to magnetic field data than traditional models

Preserves global flux rope geometry

Offers more realistic ICME structure description

Abstract

We present a generalized elliptical cylindrical flux rope model for interplanetary coronal mass ejections (ICMEs) that allows for a non zero poloidal component in the internal magnetic field. We introduce a two step reconstruction algorithm that decouples the geometric configuration from the magnetic field fitting in order to improve numerical stability and physical consistency. Applied to Parker Solar Probe data, the new radial poloidal model preserves the global flux rope geometry while achieving a substantially better fit to the internal magnetic field than the traditional radial model, offering a more accurate and realistic description of ICME structures.