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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)
  • Published : 2005.06.01

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

References

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