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http://dx.doi.org/10.5303/JKAS.2005.38.2.295

A METHOD FOR DETERMINING MAGNETIC HELICITY OF SOLAR ACTIVE REGIONS FROM SOHO/MDI MAGNETO GRAMS  

CHAE JONGCHUL (Astronomy Program, School of Earth and Environmental Science, Seoul National University)
JEONG HYEWON (Astronomy Program, School of Earth and Environmental Science, Seoul National University)
Publication Information
Journal of The Korean Astronomical Society / v.38, no.2, 2005 , pp. 295-298 More about this Journal
Abstract
Recently a big progress has been made on the measurements of magnetic helicity of solar active regions based on photospheric magnetograms . In this paper, we present the details of Chae's method of determining the rate of helicity transfer using line-of-sight magnetograms such as taken by SORO /MDI. The method is specifically applied to full-disk magnetograms that are routinely taken at 96-minute cadence.
Keywords
sun: magnetic field; sun: photosphere; sun: active regions;
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