Non-constant-α force-free field of active region NOAA 8210

Details Non-constant-α force-free field of active region NOAA 8210 Non-constant-α force-free field of active region NOAA 8210

Oct 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002esasp.505...65r&link_type=abstract

In: SOLMAG 2002. Proceedings of the Magnetic Coupling of the Solar Atmosphere Euroconference and IAU Colloquium 188, 11 - 15 Jun

Computer Science

1

Sun: Corona, Solar Magnetic Fields, Sun: Flares, Sun: Non-Constant-Alpha Force-Free Field

Scientific paper

We investigate the 3D coronal magnetic configuration of the active region NOAA 8210 (AR8210). This active region observed on May 1, 1998 is the site of numerous flares. Using the non-constant-α force-free hypothesis, we determine the coronal magnetic field of AR8210. The EIT/SOHO observations and the reconstructed magnetic configuration suggest that the initiation of the eruptive events is related to the existence of a complex topology (e.g. separatrix surfaces). From some characteristic parameters before and after the eruptions, we note that the magnetic energy (the free magnetic budget) decreases by 28% (55%, respectively).

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