Termination of Solar Wind and Solar Magnetic Field.
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Abstract
The solar magnetic field is twisted into an Archimedes spiral by the outward-flowing solar win this spiral field must also, on the average, co-rotate with the sun, in order for the solar wind to mo radially outward without cutting magnetic lines of force. The interaction between the solar wind ar the galactic magnetic field and interstellar medium results in the formation of a shock wave at a heli centric distance of the order of 50 a.u. Beyond the shock, the energy of the solar wind is transferred the interstellar neutral atomic hydrogen by charge-exchange. Instabilities at the boundary between ti solar plasma and the galactic medium cause blobs of solar plasma to form which are disconnected fro the solar magnetic field by Sweet's mechanism; oppositely directed lines of force are joined to mal large semipermanent magnetic "tongues." The solar-wind energy that is transferred to neutral hydrogo is transported out into the galaxy by radiation or thermal conduction. It is found that the solar magnet field does not permit solar-wind velocities less than about 100 km/sec.
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