Astronomy and Astrophysics – Astrophysics – Solar and Stellar Astrophysics
Scientific paper
2011-05-10
Sol. Phys., 277, 1, 45-57 (2012)
Astronomy and Astrophysics
Astrophysics
Solar and Stellar Astrophysics
Accepted for Publication in Solar Physics. 16 pages, 4 figures
Scientific paper
10.1007/s11207-011-9796-4
Solar flares occur due to the sudden release of energy stored in active-region magnetic fields. To date, the pre-cursors to flaring are still not fully understood, although there is evidence that flaring is related to changes in the topology or complexity of an active region's magnetic field. Here, the evolution of the magnetic field in active region NOAA 10953 was examined using Hinode/SOT-SP data, over a period of 12 hours leading up to and after a GOES B1.0 flare. A number of magnetic-field properties and low-order aspects of magnetic-field topology were extracted from two flux regions that exhibited increased Ca II H emission during the flare. Pre-flare increases in vertical field strength, vertical current density, and inclination angle of ~ 8degrees towards the vertical were observed in flux elements surrounding the primary sunspot. The vertical field strength and current density subsequently decreased in the post-flare state, with the inclination becoming more horizontal by ~7degrees. This behaviour of the field vector may provide a physical basis for future flare forecasting efforts.
Bloomfield Shaun D.
Gallagher Peter. T.
Murray Sophie A.
No associations
LandOfFree
The Evolution of Sunspot Magnetic Fields Associated with a Solar Flare does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with The Evolution of Sunspot Magnetic Fields Associated with a Solar Flare, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Evolution of Sunspot Magnetic Fields Associated with a Solar Flare will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-280544