Journal of The Korean Astronomical Society (천문학회지)

The Korean Astronomical Society (한국천문학회)
권호 표지

A STEADY FLOW MODEL OF A MAGNETIC FLUX TUBE CONSTRAINED TO OBSERVED DIFFERENTIAL EMISSION MEASURE

  • BONG SU-CHAN (Astronomy Program, SEES, Seoul National University) ;
  • CHAE JONGCHUL (Big Bear Solar Observatory, New Jersey Institute of Technology) ;
  • YUN HONG SIK (Astronomy Program, SEES, Seoul National University)
  • Published : 2000.12.01
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Abstract

We have investigated one dimensional steady flow model of a typical magnetic flux tube in the solar transition region constrained to observed Differential Emission Measure (DEM) for the average quiet-Sun deduced by Raymond & Doyle (1981) with a flux tube geometry conforming to Doppler shifts of UV lines measured by Chae, Yun & Poland (1998). Because local heating and filling factor in the transition region are not well known, we considered two extreme cases, one characterized by the filling factor= 1 ('filled-up model') and the other set by local heating=0 ('not-heated model'). We examined how much the heating is required for the flux tube by recomputing a model through adjustment of the filling factor in such a way that 'not-heated model' accounts for the observed DEM.

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