Comparison between observation and simulation of magnetic field changes associated with flares

Yixuan Li, Ju Jing, Yuhong Fan, Haimin Wang

Research output: Contribution to journalArticlepeer-review

18 Scopus citations

Abstract

It has been a long-standing question in solar physics how magnetic field structure changes with eruptive events (e.g., flares and coronal mass ejections). In this Letter, we present the eruption-associated changes in the magnetic inclination angle, the horizontal component of magnetic field vectors, and the Lorentz force. The analysis is based on the observation of the X3.4 flare on 2006 December 13 and in comparison to the numerical simulation of Fan. Both observation and simulation show that (1) the magnetic inclination angle in the decayed peripheral penumbra increases, while that in the central area close to the flaring polarity inversion line (PIL) deceases after the flare; (2) the horizontal component of magnetic field increases at the lower altitude near the flaring PIL after the flare. The result suggests that the field lines at the flaring neutral line turn to more horizontal near the surface, that is in agreement with the prediction of Hudson et al.

Original languageEnglish (US)
JournalAstrophysical Journal Letters
Volume727
Issue number1 PART II
DOIs
StatePublished - Jan 20 2011

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Keywords

  • Sun: flares
  • Sun: magnetic topology

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