KH -mechanism of a solar eruption produced self-consistently by flux emergence

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Abstract

We report on a new magnetohydrodynamic simulation for the sequence evolution of a magnetic field from emergence to eruption on the Sun. The magnetic field in the shape of a twisted flux tube emerging below the solar surface forms a pre-eruptive structure in the corona, which is composed of expanding envelop flux and a quasi-static inner core called flux rope; this inner core eventually seems to erupt. The evolution proceeds self-consistently; that is, any preexisting coronal magnetic field that causes additional side effects on the evolution of the emerging magnetic field is not assumed. This highlights a possible eruption mechanism inherent in the dynamic nature of the emerging magnetic field. The mechanism is characterized by two key quantities: the curvature (k) and the scale height (H) of the emerging magnetic field.

Original languageEnglish
Article numberL5
JournalPublication of the Astronomical Society of Japan
Volume65
Issue number3
DOIs
Publication statusPublished - 25 Jun 2013

Keywords

  • Magnetohydrodynamics: MHD
  • Sun: coronal mass ejections
  • Sun: magnetic fields

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