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Title:
The Three-dimensional Coronal Magnetic Field during Whole Sun Month
Authors:
Gibson, S. E.; Biesecker, D.; Guhathakurta, M.; Hoeksema, J. T.; Lazarus, A. J.; Linker, J.; Mikic, Z.; Pisanko, Y.; Riley, P.; Steinberg, J.; Strachan, L.; Szabo, A.; Thompson, B. J.; Zhao, X. P.
Journal:
The Astrophysical Journal, Volume 520, Issue 2, pp. 871-879. (ApJ Homepage)
Publication Date:
08/1999
Origin:
APJ
ApJ Keywords:
MAGNETOHYDRODYNAMICS: MHD, SUN: SOLAR WIND, SUN: CORONA, SUN: MAGNETIC FIELDS
Abstract Copyright:
(c) 1999: The American Astronomical Society
Bibliographic Code:
1999ApJ...520..871G

Abstract

Combining models and observations, we study the three-dimensional coronal magnetic field during a period of extensive coordinated solar observations and analysis known as the Whole Sun Month (WSM) campaign (1996 August 10-September 8). The two main goals of the WSM campaign are addressed in this paper, namely, (1) to use the field configuration to link coronal features observed by coronagraphs and imaging telescopes to solar wind speed variations observed in situ and (2) to study the role of the three-dimensional coronal magnetic field in coronal force balance. Specifically, we consider how the magnetic field connects the two fastest wind streams to the two regions that have been the main foci of the WSM analysis: the equatorial extension of the north coronal hole (known as the Elephant's Trunk) and the axisymmetric streamer belt region on the opposite side of the Sun. We then quantitatively compare the different model predictions of coronal plasma and solar wind properties with observations and consider the implications for coronal force balance and solar wind acceleration.
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