The energy source of the interplanetary medium and the heliosphere

Details The energy source of the interplanetary medium and the heliosphere The energy source of the interplanetary medium and the heliosphere

Jun 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987nascp2464...75p&link_type=abstract

In NASA Goddard Space Flight Center, Greenbelt, Md. Essays in Space Science p 75-85 (SEE N87-24247 17-88)

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1

Heating, Heliosphere, Interplanetary Medium, Solar Corona, Solar Wind, Coronal Holes, Energy Distribution, Magnetohydrodynamics, Wave Propagation

Scientific paper

The activity of the interplanetary medium arises from occasional transient outbursts of the active corona and, for the most part, from the interaction of fast and slow streams in the solar wind. The basic driver is the heat input to the corona, both transient and steady. The fast streams issue from coronal holes where the heat input may be Alfven waves with root mean squared (rms) fluid velocities of nearly 100 km/sec or may be wholly or in part the waves refracted into the hole from neighboring active regions. If the latter, then the character of the wind from the coronal hole depends upon the proximity and vigor of active regions, with significant differences between the polar and low altitude solar wind. In any case, there is no observational support for any of these ideas, so that the primary cause of the wind from the Sun, as well as any other similar star is not without mystery. It is to be hoped that ground-based observations together with the input from the Solar Optical Telescope and the International Solar Polar Mission may in time succeed in clearing up some of the basic questions.

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