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The coronal structure of active regionsA four-parameter model, which assumes a Gaussian dependence of both temperature and pressure on distance from center, is used to fit the compact part of coronal active regions as observed in X-ray photographs from a rocket experiment. The four parameters are the maximum temperature, the maximum pressure, the width of the pressure distribution, and the width of the temperature distribution. The maximum temperature ranges from 2.2 to 2.8 million K, and the maximum density from 2 to 9 by 10 to the 9th power per cu cm. The range of the pressure-distribution width is from 2 to 4 by 10 to the 9th power cm and that of the temperature-distribution width from 2 to 7.
Document ID
19760034465
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Landini, M.
(American Science and Engineering, Inc. Cambridge, MA, United States)
Monsignori Fossi, B. C.
(Arcetri Osservatorio Astrofisico, Florence, Italy)
Krieger, A.
(American Science and Engineering, Inc. Cambridge, MA, United States)
Vaiana, G. S.
(American Science and Engineering, Inc. Cambridge, Mass., United States)
Date Acquired
August 8, 2013
Publication Date
September 1, 1975
Publication Information
Publication: Solar Physics
Volume: 44
Subject Category
Solar Physics
Accession Number
76A17431
Funding Number(s)
CONTRACT_GRANT: NASW-2346
CONTRACT_GRANT: NAS8-2778
Distribution Limits
Public
Copyright
Other

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