Procedure

  • From the loops very little can be known about
    the actual magnetic field lines.

  • The idea is to manually draw the loops on a
    computer screen and comparing these curves
    with
    the shape of field lines with a range of different
    alphas.

  • The best fitting field line, for a given loop, would
    give the best estimate of α for that particular loop.


  
       fig.2. Coronal loops in EUV as observed by spacecrafts

                                                               
                                                                                           fig.3. Procedure in a nut-shell

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The Sixth Slide