Transient behavior of a flare-associated solar wind. I - Gas dynamics in a radial open field region

Computer Science – Sound

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Gas Dynamics, Solar Corona, Solar Flares, Solar Wind, Shock Waves, Temperature Distribution, Time Dependence, Transient Response, Velocity Distribution

Scientific paper

A numerical investigation is conducted into the way in which a solar wind model initially satisfying both steady state and energy balance conditions is disturbed and deformed, under the assumption of heating that correspoonds to the energy release of solar flares of an importance value of approximately 1 which occur in radial open field regions. Flare-associated solar wind transient behavior is modeled for 1-8 solar radii. The coronal temperature around the heat source region rises, and a large thermal conductive flux flows inward to the chromosphere and outward to interplanetary space along field lines. The speed of the front of expanding chromospheric material generated by the impingement of the conduction front on the upper chromosphere exceeds the local sound velocity in a few minutes and eventually exceeds 100 million cm/sec.

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