Astronomy and Astrophysics – Astronomy
Scientific paper
May 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aas...200.6808b&link_type=abstract
American Astronomical Society, 200th AAS Meeting, #68.08; Bulletin of the American Astronomical Society, Vol. 34, p.756
Astronomy and Astrophysics
Astronomy
Scientific paper
Do photospheric magnetic fields show systematic changes which precede energetic events such as solar flares? The answer has proved elusive. We address this question by examining vector magnetic flux maps from the U. Hawai`i Imaging Vector Magnetograph (Mickey et al. 1996), which obtain full Stokes spectra over entire active regions every 4 minutes on average. We compare numerous parameters derived from the vector magnetograms of flaring active regions to those from comparable non-flaring active regions. In addition, we determine quantitative measurements of the complexity of the field topology using the Minimum-Current Corona analysis (Longcope 1996). The goal is to determine quantitative measurements of the complexity of the field topology, and determine whether variations in those measures correlate with or precede flare events. This project was funded by AFOSR contract F49620-00-C-0004.
Barnes Graham
Leka Kimberly Dawn
Longcope Dana Warfield
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