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L-alpha intensity in coronal streamersWhite-light images are presently the primary source of information on physical conditions in the solar corona at distances greater than a few tenths of a solar radius above the limb. As a consequence, we still only have an incomplete description of structures extending beyond the solar limb. In particular, streamers, although observed for decades, represent a poorly known phenomenon. SOHO, to be launched in 1995, will be able to make long-term observations of these features up to heights of a few solar radii, both in white light and UV. In this paper we present simulations of L-alpha intensity in coronal streamers, based on the two-dimensional (2D) model developed by Wang et at. (1992, 1993) via a time-dependent numerical relaxation approach. Because the model is 2D, we make an a priori hypothesis about the extension of streamers in the third dimension. L-alpha data, obtained from a rocket (Kohl et al., 1983), allowed us to identify a shape which fits the observations.
Document ID
19940033410
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Noci, G.
(Firenze, Univ. Florence, Italy)
Poletto, G.
(Arcetri Osservatorio Astrofisico, Florence, Italy)
Suess, S. T.
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Wang, A.-H.
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Wu, S. T.
(Alabama Univ. Huntsville, United States)
Date Acquired
August 16, 2013
Publication Date
September 1, 1993
Publication Information
Publication: Solar Physics
Volume: 147
Issue: 1
ISSN: 0038-0938
Subject Category
Solar Physics
Accession Number
94A10065
Funding Number(s)
CONTRACT_GRANT: NAGW-9
Distribution Limits
Public
Copyright
Other

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