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Solar Polar Rays Are Not Polar

Published online by Cambridge University Press:  13 May 2016

J. Li ,
D. Jewitt ,
B. LaBonte  and
L. Acton
J. Li
Affiliation:
Institute for Astronomy, University of Hawaii
D. Jewitt
Affiliation:
Institute for Astronomy, University of Hawaii
B. LaBonte
Affiliation:
Institute for Astronomy, University of Hawaii
L. Acton
Affiliation:
Department of Physics, Montana State University

Abstract

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We discuss the nature of polar rays, based on limb synoptic images constructed from Yohkoh/SXT and SORafElT data. In the literature, polar rays and polar plumes are often mentioned interchangably. We find that polar rays are projection effects caused by hot plasma from equatorial active areas and are not physically associated with the coronal polar holes. Instead, the rise in number and strength of polar rays toward solar activity maximum may be responsible for hiding the polar holes and polar plumes.

Type
Session IV: Structure and Dynamics of the Transiton Region and Corona
Information
Symposium - International Astronomical Union , Volume 203: Recent Insights into the Physics of the Sun and Heliosphere: Highlights from Soho and Other Space Missions , 2001 , pp. 404 - 406
Copyright
Copyright © Astronomical Society of the Pacific 2001 

References

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