Large-scale structure of the fast solar wind

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...

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Bibliographic Details
Published in:Journal of Geophysical Research: Space Physics 2007-06, Vol.112 (A6), p.n/a
Main Authors: Bisi, M. M., Fallows, R. A., Breen, A. R., Rifai Habbal, S., Jones, R. A.
Format: Article
Language:English
Subjects:
Earth sciences
Earth, ocean, space
EISCAT
Exact sciences and technology
interplanetary scintillation (IPS)
solar wind
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Summary: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.
ISSN:0148-0227
2156-2202
DOI:10.1029/2006JA012166