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solar phenomena associated with "eit waves"In an effort to understand what an 'EIT wave' is and what its causes are, we have looked for correlations between the initiation of EIT waves and the occurrence of other solar phenomena. An EIT wave is a coronal disturbance, typically appearing as a diffuse brightening propagating across the Sun. A catalog of EIT waves, covering the period from 1997 March through 1998 June, was used in this study. For each EIT wave, the catalog gives the heliographic location and a rating for each wave, where the rating is determined by the reliability of the observations. Since EIT waves are transient, coronal phenomena, we have looked for correlations with other transient, coronal phenomena: X-ray flares, coronal mass ejections (CMEs), and metric type II radio bursts. An unambiguous correlation between EIT waves and CMEs has been found. The correlation of EIT waves with flares is significantly weaker, and EIT waves frequently are not accompanied by radio bursts. To search for trends in the data, proxies for each of these transient phenomena are examined. We also use the accumulated data to show the robustness of the catalog and to reveal biases that must be accounted for in this study.
Document ID
20040201034
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Biesecker, D. A.
(Emergent Information Technologies, Inc. Greenbelt, MD, United States)
Myers, D. C.
(Emergent Information Technologies, Inc. Greenbelt, MD, United States)
Thompson, B. J.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Hammer, D. M.
(Emergent Information Technologies, Inc. Greenbelt, MD, United States)
Vourlidas, A.
(George Mason Univ. Fairfax, VA, United States)
Date Acquired
August 22, 2013
Publication Date
April 20, 2002
Publication Information
Publication: Astronomical Journal
Volume: 569
Issue: 2, Pt. 1
ISSN: 0004-637X
Subject Category
Solar Physics
Distribution Limits
Public
Copyright
Other