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The plasma and magnetic field properties of coronal loops observed at high spatial resolutionTwo data sets are analyzed in order to improve understanding of the plasma and magnetic field properties of active region coronal loops. Each set consists of coaligned, high spatial resolution soft X-ray, microwave, and magnetogram images that are used to compare observations of coronal loops and their feet in the photosphere and to constrain possible microwave emission mechanisms. The loops are found to have plasma parameters typical of quiescent active region loops. Each loop has a compact microwave source with peak brightness temperature T(b) = 1-2.5 x 10 to the 6th K cospatial with or near the loop apex. No complete loops are imaged in microwaves. The loop emission observed at 4.9 GHz is best described by fourth harmonic gyroresonance emission from a dipole loop model, but with less field variation along the loop than in the models of Holman and Kundu (1985).
Document ID
19870062205
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Webb, D. F.
(American Science and Engineering, Inc. Cambridge; Emmanuel College, Boston, MA, United States)
Holman, G. D.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Davis, J. M.
(NASA Marshall Space Flight Center Huntsville, AL; American Science and Engineering, Inc., Cambrid, United States)
Kundu, M. R.
(American Science and Engineering, Inc. Cambridge, MA, United States)
Shevgaonkar, R. K.
(Maryland, University College Park, United States)
Date Acquired
August 13, 2013
Publication Date
April 15, 1987
Publication Information
Publication: Astrophysical Journal, Part 1
Volume: 315
ISSN: 0004-637X
Subject Category
Solar Physics
Report/Patent Number
AD-A188665
AFGL-TR-87-0316
Accession Number
87A49479
Funding Number(s)
CONTRACT_GRANT: NSF ATM-84-15388
CONTRACT_GRANT: NGR-21-002-199
CONTRACT_GRANT: NAG5-511
CONTRACT_GRANT: F19628-82-K-0039
CONTRACT_GRANT: NSF ATM-83-14115
Distribution Limits
Public
Copyright
Other

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