Semiempirical model of the solar wind

Astronomy and Astrophysics – Astronomy

Scientific paper

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Interplanetary Space, Magnetohydrodynamics, Plasma Density, Solar Wind, Astronomical Models, Density Distribution, Solar Wind Velocity, Temperature Distribution

Scientific paper

Experimental data on the density distribution at various heliocentric distances are used in a hydrodynamic approximation to develop a semiempirical model of the solar wind in which the values of the basic solar-wind parameters agree with measurements made in all sectors of interplanetary space. The temperature distribution for distances ranging from 1 to 215 solar radii is determined, and the existence of a local temperature maximum at distances between 15 and 50 solar radii is revealed. It is shown that the temperature-distance distribution cannot be described by a simple polytropic law. The results obtained are employed to calculate the additional energy flux required for the production of a solar wind with the observed parameters; the distribution of this flux in interplanetary space is also computed.

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