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X-ray bright points and He I lambda 10830 dark pointsUsing near-simultaneous full disk Solar X-ray images and He I 10830 lambda, spectroheliograms from three recent rocket flights, dark points identified on the He I maps were compared with x-ray bright points identified on the X-ray images. It was found that for the largest and most obvious features there is a strong correlation: most He I dark points correspond to X-ray bright points. However, about 2/3 of the X-ray bright points were not identified on the basis of the helium data alone. Once an X-ray feature is identified it is almost always possible to find an underlying dark patch of enhanced He I absorption which, however, would not a priori have been selected as a dark point. Therefore, the He I dark points, using current selection criteria, cannot be used as a one-to-one proxy for the X-ray data. He I dark points do, however, identify the locations of the stronger X-ray bright points.
Document ID
19900037527
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Golub, L.
(Smithsonian Astrophysical Observatory Cambridge, MA, United States)
Harvey, K. L.
(Solar Physics Research Corp. Tucson, AZ, United States)
Herant, M.
(Harvard University Cambridge, MA, United States)
Webb, D. F.
(Emmanuel College, Boston; American Science and Engineering, Inc. Cambridge, MA, United States)
Date Acquired
August 14, 2013
Publication Date
January 1, 1989
Publication Information
Publication: Solar Physics
Volume: 124
Issue: 2 19
ISSN: 0038-0938
Subject Category
Solar Physics
Accession Number
90A24582
Funding Number(s)
CONTRACT_GRANT: NAGW-112
CONTRACT_GRANT: NAS5-25496
CONTRACT_GRANT: F19628-87-K-0033
Distribution Limits
Public
Copyright
Other

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