Large-scale structure of the fast solar wind

Mario Mark Bisi, Andrew Breen, Richard A. Fallows, Shadia Rifai Habbal, R. A. Jones

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Abstract

We present the results of a comprehensive study of the fast solar wind near solar minimum conditions using interplanetary scintillation (IPS) data taken with the EISCAT system in northern Scandinavia, and a recent extremely long baseline observation using both EISCAT and MERLIN systems. The results from IPS observations suggest that the fast wind inside 100 solar radii (R ) can be represented by a two-mode model in some cases but this distinction is much less clear by in situ distances beyond 1 astronomical unit (215 R ). Two distinct fast streams are seen in the extremely long baseline IPS observation; comparison of the IPS line of sight with a synoptic map of white light indicates the faster mode overlies the polar crown and the slower fast mode overlies an equatorial extension of the polar coronal hole.
Original languageEnglish
JournalJournal of Geophysical Research: Space Physics
Volume112
Issue numberA6
DOIs
Publication statusPublished - 01 Jun 2007

Keywords

  • EISCAT
  • interplanetary scintillation (IPS)
  • solar wind

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