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The evolution of active region loop plasmaThe adjustment of coronal active-region loops to changes in their heating rate is investigated numerically. The one-dimensional hydrodynamic equations are solved subject to boundary conditions in which heat flux-induced mass exchange between coronal and chromospheric components is allowed. The calculated evolution of physical parameters suggests that (1) mass supplied during chromospheric evaporation is much more effective in moderating coronal temperature excursions than when downward heat flux is dissipated by a static chromosphere, and (2) the method by which the chromosphere responds to changing coronal conditions can significantly influence coronal readjustment time scales. Observations are cited which illustrate the range of possible fluctuations in the heating rates.
Document ID
19810034079
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Krall, K. R.
(NASA Marshall Space Flight Center Space Sciences Laboratory, Huntsville, Ala., United States)
Antiochos, S. K.
(Stanford University Stanford, Calif., United States)
Date Acquired
August 11, 2013
Publication Date
November 15, 1980
Publication Information
Publication: Astrophysical Journal
Subject Category
Solar Physics
Accession Number
81A18483
Funding Number(s)
CONTRACT_GRANT: N00014-75-C-0673
CONTRACT_GRANT: NGL-05-020-272
Distribution Limits
Public
Copyright
Other

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