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Hydrogen and helium excitation by EUV radiation for the production of white-light flaresNon-LTE radiative transfer calculations for hydrogen and helium in a simple model atmosphere are used to demonstrate that EUV radiation cannot be the main energy source for white-light flares. The opacities in the Lyman continuum and the helium I and II continua are found to be much larger than the enhanced opacity in the visible hydrogen continuum. It is shown that the EUV radiation is absorbed before it can have a significant effect on the visible light continuum.
Document ID
19890031650
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Poland, A. I.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Milkey, R. W.
(Space Telescope Science Institute Baltimore, MD, United States)
Thompson, W. T.
(Applied Research Corp. Landover, MD, United States)
Date Acquired
August 14, 2013
Publication Date
January 1, 1988
Publication Information
Publication: Solar Physics
Volume: 115
Issue: 2 19
ISSN: 0038-0938
Subject Category
Solar Physics
Accession Number
89A19021
Funding Number(s)
CONTRACT_GRANT: NAS5-28407
Distribution Limits
Public
Copyright
Other

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