A comparison of coronal mass ejection models with observations for two large CMEs detected during the whole heliosphere interval

Chia Hsien Lin, James Chen

Research output: Contribution to journalArticlepeer-review

Abstract

Two major coronal mass ejections (CMEs) observed during the Whole Heliosphere Interval (WHI) are compared with the catastrophe (CA) and eruptive flux rope (EF) models. The objective is to test two distinct mechanisms for CMEs by modeling these well-observed CMEs and comparing predictions of the theories and observed data. The two CMEs selected for this study occurred on 25 March and 5 April 2008, respectively. For the 25 March event, an M 1.7 class flare, a filament eruption, and hard X-ray (HXR) and soft X-ray (SXR) emissions were observed during the CME onset. The observed CME kinematics and SXR light curve of this event are found to be more consistent with the EF model than with the CA model. For the 5 April event, the SXR light curve shows multiple enhancements, some of which temporally coincide with successive side loop brightening and multiple foot points at the source region after the eruption. The physical connection between the side-loop multiple brightenings and the eruption cannot be determined from the data. Both models produced observationally consistent kinematics profiles, and the EF model correctly predicted the first emission enhancement. Neither model includes multiple brightenings in the formulation.

Original languageEnglish
Pages (from-to)121-134
Number of pages14
JournalTerrestrial, Atmospheric and Oceanic Sciences
Volume26
Issue number2
DOIs
StatePublished - 1 Apr 2015

Keywords

  • CME model
  • Coronal mass ejections
  • Solar corona
  • Solar flares
  • Solar magnetic fields

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