๐”– Bobbio Scriptorium
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The structure of coronal arcades and the formation of solar prominences

โœ Scribed by E. R. Priest; E. A. Smith

Publisher
Springer
Year
1979
Tongue
English
Weight
869 KB
Volume
64
Category
Article
ISSN
0038-0938

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โœฆ Synopsis

The temperature and density are obtained for coronal plasma in thermal and hydrostatic equilibrium and located in a force-free magnetic arcade. The isotherms are found to be inclined to the magnetic field lines and so care should be taken in inferring the magnetic structure from observed emission.

When the coronal pressure becomes too great, the equilibrium ceases to exist and the material cools to form a quiescent prominence, The same process can be initiated at low heating rates when the width or shear of the arcade exceeds a critical value.

We suggest that the prominence should be modelled as a dynamic structure with plasma always draining downwards. Material is continually sucked up along field lines of the ambient arcade and into the region lacking a hot equilibrium, where it cools to form new prominence material.

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