Reconstruction of Solar Coronal Linear Force-Free Magnetic Field

Solar magnetic fields has an important role in the construction of the corona. in the coronal condition, the gas pressure and gravity are neglected as com-paired with the magnetic pressure. here, the model of linear force-free field (lfff) is introduced. based on this model and appropriate boundary conditions, the structure of coronal magnetic field is reconstructed.first, using semi-analytic seehafer method, the lfff is reconstructed using the wiegelmann code for the line of sight (los) magnetogram. then, the magnetic field lines and loops on a given magnetogram is plotted on the corresponding aia image for estimating the compatibility. finally, by calculating the variance between a given traced loop and corresponding reconstructed loops, we find a proper magnetic field parameter for reconstructing a loop before and after flaring.