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Resistive ballooning modes in line-tied coronal fields

โœ Scribed by M. Velli; A. W. Hood

Book ID
104649263
Publisher
Springer
Year
1987
Tongue
English
Weight
144 KB
Volume
109
Category
Article
ISSN
0038-0938

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โœฆ Synopsis

The resistive stability of coronal loops to perturbations with short wavelength across the magnetic field is analysed, taking full account of the line tying effect due to the presence of the photosphere. The results presented are similar to those previously obtained for arcades: configurations with a pressure profile decreasing with distance from the loop axis at some point are found to be always unstable, the growth rate ~,increasing monotonically with the wavenurnber (n) and scaling approximately as ? ~ (n 2 Dr) I/3 in the limit of large n.

๐Ÿ“œ SIMILAR VOLUMES

Resistive ballooning modes in line-tied
Resistive ballooning modes in line-tied coronal fields
โœ M. Velli; A. W. Hood ๐Ÿ“‚ Article ๐Ÿ“… 1986 ๐Ÿ› Springer ๐ŸŒ English โš– 560 KB

The stability of coronal arcades to localized resistive interchange modes in the ballooning ordering, including photospheric line tying, is investigated. It is found that the anchoring of magnetic footpoints in the photosphere is not sufficient to stabilise ballooning modes, once resistivity is take

The effects of parallel and perpendicula
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โœ R. Linden; M. Goossens; A. W. Hood ๐Ÿ“‚ Article ๐Ÿ“… 1988 ๐Ÿ› Springer ๐ŸŒ English โš– 682 KB

The study of resistive ballooning instabilities in line-tied coronal magnetic fields is extended by including viscosity in the stability analysis. The equations that govern the resistive ballooning instabilities are derived and the effects of parallel and perpendicular viscosity are included using B