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Title:
On cool coronal loops
Authors:
Martens, P. C. H.; Kuin, N. P. M.
Affiliation:
AA(Utrecht, Rijksuniversiteit, Utrecht, Netherlands), AB(Utrecht, Rijksuniversiteit, Utrecht, Netherlands)
Publication:
Astronomy and Astrophysics, vol. 112, no. 2, Aug. 1982, p. 366-368. (A&A Homepage)
Publication Date:
08/1982
Category:
Solar Physics
Origin:
STI
NASA/STI Keywords:
CORONAL LOOPS, SOLAR CORONA, COLD PLASMAS, HYDROSTATIC PRESSURE, PLASMA EQUILIBRIUM, PLASMA HEATING, RADIATIVE TRANSFER, SOLAR TEMPERATURE
Comment:
A&AA ID. AAA032.074.014
Bibliographic Code:
1982A&A...112..366M

Abstract

Analytical model calculations and physical arguments are used to examine cool equilibria in coronal loops. Static loop model assumptions include a one-dimensional energy equation, a constant cross-sectional area, and a loop symmetric top. It is shown, in contradiction to Hood and Priest (1979) results, that cool loop maximum height has a minimal dependence on the heating mechanism and the radiation losses, and does not depend on constants of proportionality. In addition, thermal catastrophe occurs not only as a result of loop length variations, but also as a result of heating or pressure variations. It is also concluded that for a given heating mechanism, thermal catastrophe occurs at only one loop length.

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