A Technique for Automated Determination of Flare Ribbon Separation and Energy Release

作者：Maurya R A^*; Ambastha A

来源：Solar Physics, 2010, 262(2): 337-353.

DOI：10.1007/s11207-009-9488-5

• Flares, dynamics
• Active regions, magnetic fields

We present a technique for automatic determination of flare ribbon separation and the energy released during the course of two-ribbon flares. We have used chromospheric H alpha filtergrams and photospheric line-of-sight magnetograms to analyse flare ribbon separation and magnetic field structures, respectively. Flare ribbons were first enhanced and then extracted by the technique of "region growing", i.e., a morphological operator to help resolve the flare ribbons. Separation of flare ribbons was then estimated from the magnetic-polarity reversal line using an automatic technique implemented into an Interactive Data Language (IDL(TM)) platform. Finally, the rate of flare-energy release was calculated using photospheric magnetic field data and the corresponding separation of the chromospheric H alpha flare ribbons. This method could be applied to measure the motion of any feature of interest (e.g., intensity, magnetic, Doppler) from a given point of reference.

• 出版日期2010-4