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The coronal and transition region temperature structure of a solar active regionUsing measurements of EUV and X-ray spectral lines, the differential emission measure vs electron temperature from the transition region to the corona of an active region (electron temperature between 100,000 and 5,000,000 K) is derived. The total emission measure and radiative losses are of the order 3 x 10 to the 48th/cu cm and 4 x 10 to the 26th ergs/sec, respectively. The emission measure at electron temperatures greater than approximately 1,000,000 K (i.e. that mainly responsible for the X-ray emission) is about 75% of the total. The use of the Mg x line at 625 A as an indicator of coronal electron density is also examined. A set of theoretical energy balance models of coronal loops in which the loop divergence is a variable parameter is presented and compared with the observations.
Document ID
19800049935
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Levine, R. H.
(Harvard-Smithsonian Center for Astrophysics Cambridge, Mass., United States)
Pye, J. P.
(Leicester, University Leicester, United Kingdom)
Date Acquired
August 10, 2013
Publication Date
May 1, 1980
Publication Information
Publication: Solar Physics
Volume: 66
Subject Category
Solar Physics
Accession Number
80A34105
Funding Number(s)
CONTRACT_GRANT: NAS5-3949
Distribution Limits
Public
Copyright
Other

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