Study of the change of surface magnetic field associated with flares

Document Type

Conference Proceeding

Publication Date

1-1-2011

Abstract

How magnetic field structure changes with eruptive events (e.g., flares and CMEs) has been a long-standing problem in solar physics. Here we present the analysis of eruptionassociated changes in the magnetic inclination angle, the transverse component of magnetic field and the Lorentz force. The analysis is based on an observation of the X3.4 flare on Dec.13 2006 and a numerical simulation of a solar eruption made by Yuhong 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 flaring polarity inversion line (PIL) deceases after the flare; (2) the transverse component of magnetic field increases at the lower altitude near flaring PIL after the flare. The result suggests that the field lines at flaring neutral line turn to more horizontal near the surface, that is in agreement with the prediction of Hudson, Fisher &Welsch (2008). © International Astronomical Union 2011.

Identifier

84882984707 (Scopus)

ISBN

[9780521760621]

Publication Title

Proceedings of the International Astronomical Union

External Full Text Location

https://doi.org/10.1017/S1743921311015675

e-ISSN

17439221

ISSN

17439213

First Page

417

Last Page

421

Issue

S273

Volume

6

Grant

AGS-0936665

Fund Ref

National Science Foundation

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