Space plasma and its origin at the sun

Details Space plasma and its origin at the sun Space plasma and its origin at the sun

Aug 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991phflb...3.2367p&link_type=abstract

(APS Division of Plasma Physics, Annual Meeting, 32nd, Cincinnati, OH, Nov. 12-16, 1990, Invited and Review Papers. A91-46583 19

Physics

Plasma Physics

6

Coronal Holes, Current Sheets, Heliosphere, Solar Corona, Space Plasmas, Magnetohydrodynamic Waves, Plasma-Electromagnetic Interaction, Solar Activity, Solar Magnetic Field, Solar Wind

Scientific paper

This paper provides a concise review of the large picture of space plasmas, concentrating on the heliosphere and the origin of the X-ray corona and coronal hole at the sun. It is tentatively suggested that the active X-ray corona is heated primarily by the dissipation of magnetic energy at the spontaneous tangential discontinuities (current sheets) in the confining bipolar magnetic fields of active regions. The discontinuities arise because of the continuous mapping of the footpoints of the field by the photospheric convection. The coronal holes appear to be heated by a combination of Alfven waves, providing the high-speed streams in the solar wind, and the microflaring in the small-scale network fields.

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