LINE OF SIGHT MAGNETIC FIELD EVOLUTION & 120310 DATA ANALYSIS Dandan Ye.
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Transcript of LINE OF SIGHT MAGNETIC FIELD EVOLUTION & 120310 DATA ANALYSIS Dandan Ye.
LINE OF SIGHT MAGNETIC FIELD EVOLUTION & 120310 DATA ANALYSIS
Dandan Ye
Content
Part 1 Line of Sight magnetic field evolution
Part 2 120310 SDO data analysis
Line of Sight magnetic field evolution
Paperview:
Flare Energy and Magnetic Field Variations
H. S. Hudson, G. H. Fisher, B. T. Welsch
Introduction: Magnetic field created in convection zone
and then ascends through the photosphere and emerges into the corona. The emerged flux contains embedded stresses that may accumulate for some period of time and then relax, producing a flare and/or a CME.
The photospheric vector magnetic field might vary across the duration of a solar flare or CME.
Line of Sight magnetic field evolution
Perhaps the first clear illustration of a flare-associated magneticfield change (Wang 1992)
Line of Sight magnetic field evolution
Simple model: to estimate the energy deposited in the subphotospheric layers in this back-reaction
Principle: any change of magnetic field energy must lead to a corresponding change in magnetic pressure
Line of Sight magnetic field evolution
Conclusion: They predict that flares can be
accompanied by rapid and irreversible changes of photospheric magnetic fields.
Line of Sight magnetic field evolution
OBSERVATIONAL EVIDENCE OF BACK REACTION ON THE SOLAR SURFACE ASSOCIATED WITH CORONAL MAGNETIC RESTRUCTURING IN SOLAR ERUPTIONS
Haimin Wang and Chang Liu
provides support for the theory and prediction of Hudson : photospheric magnetic fields must respond to coronal field restructuring and turn to a more horizontal state near the PIL after eruptions.
20120310 SDO data
20120310 SDO data
HMI magnetogram
AIA 171 304 1600
20120310 SDO data
20120310 SDO data
20120310 SDO data
20120310 SDO data
Next Steps
Analyzing the line-of-sight magnetic field evolution of the 20121023 X-class flare as a practice
Try to do a running average of flow-field data on 20120701
Doing some study about the flares on 20120310
Thanks!