Examples of Heat and Momentum Addition in the Corona for the Development of Bi-Modal Solar Wind

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2111 Ejecta, Driver Gases, And Magnetic Clouds

Scientific paper

It is well known that the two most important components of the corona are the streamer and coronal hole. They are quasi-stationary large-scale structures in which the streamers consist of a magnetically closed region near the solar surface with high plasma density and temperature. On the other hand, coronal holes consist of magnetically open regions with low density and temperature. It is further understood that the slow solar wind is comes from the top of the streamers and the fast solar wind is produced at coronal holes. In our previous work, we have demonstrated that it is possible to model these general characteristics qualitatively by using a two-dimensional, magnetohydrodynamic model with heat and momentum addition. In this presentation, we will use examples to illustrate the interplay of the heat and momentum additions and the general characteristics in the construction of the bi-modal solar wind. Particularly, we will assess the preferred conditions to deposit the additional heat and momentum in the corona to effect the outcome of the bi-modal solar wind.

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