The Stationary State of Magnetic Field Near The Sun

In this study, the structure of coronal magnetic field has modeled both analytically and numerically. The coronal magnetic field has been studied inside the active region. The analytical model of coronal magnetic field structure has been compared with that of the analytical model which has been done using NASA's CCMC modeling center software. They showed a good agreement except the analytical mode predicts very elongated closed field lines that are not observed in nature. Both models have been showed that coronal magnetic field on the equatorial region of the sun are closed and are open on the poles. In addition the effect of the structure of magnetic field on other physical parameters like velocity of plasma, density of the corona and temperature on the different parts of the sun have been clearly showed. In the attempt of modeling the magnetic field analytically first the expression for stationary state magnetic field of solar corona has been derived by taking an assumption that the temperature of the corona isothermal, but for the numerical model variation in temperatures have been consider.