Other
Scientific paper
May 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000ohbp.conf...13s&link_type=abstract
"In: The outer heliosphere: beyond the planets. Based on the spring school "Die äußere Heliosphäre - Jenseits der Planeten, in B
Other
2
Solar Wind, Heliosphere
Scientific paper
A tutorial review of the origin of the solar wind is presented in this chapter. At the outset, the concept of the solar wind is introduced and its various components and their charactertistics are discussed. Also outlined are some of the important space missions dedicated to the study of the solar wind and a review of their observations. The salient features of a three-dimensional model of the inner heliosphere are presented on the basis of the observations. From these space-based observations, it is now well established that there exists a close relation between the 3D heliosphere and the underlying coronal structure. Around solar activity minimum, large polar coronal holes dominate the major part of the heliosphere through which emanates the high-speed solar wind. On the other hand, another type of solar wind which is relatively slow, is restricted to a narrow equatorial belt of about ±30° width in latitude. The magnetic topology is dominated by strong multipole components and multiple current sheets in the upper corona and by a large-scale dipole field further outside, respectively. In this review, the emphasis is laid on the new observations and findings by several sophisticated instruments aboard SOHO which observe both, the inner and outer corona. These have revealed several clues to the solar origins or the source regions of the two types of solar wind, viz., the fast and the slow solar wind. The observations also unravel the finer details of the processes that are responsible for their generation. Finally, we summarize the present status of our knowledge on the origin of solar wind.
Schwenn Rainer
Srivastava Nandita
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