Dynamics of Coronal Streamers: 2.5D MHD simulations with semi-empirical heating and momentum terms

Astronomy and Astrophysics – Astrophysics

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[7509] Solar Physics, Astrophysics, And Astronomy / Corona

Scientific paper

We present the results of fully non-linear resistive magnetohydrodynamic (MHD) simulations of an equatorially confined streamer belt using observational constrains in a two-fluid 2.5D MHD modeling in spherical geometry . Specifically, we used the PFSS model of the initial coronal magnetic field configuration with the boundary conditions at the photosphere specified by the NSO/GONG magnetogram data. Calculations were performed for the fully thermally conductive case with the two-component (electrons and protons) heat flux, qeff , and the effective temperature, Teff, derived from the semi-empirical steady-state model (SG model). Our simulations were performed between the coronal base at 1.02 to 5 solar radii. We show that our MHD simulations are more realistic than polytropic models, and capable of reproducing basic thermodynamic and kinematic properties of the coronal streamer structure observed in July 3-17, 2007 by COR1 STEREO.

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