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Overstability of magnetic flux tubes in the Eddington approximation

Articolo
Data di Pubblicazione:
1989
Abstract:
The behavior of overstable modes of a magnetic flux tube embedded in a stellar atmosphere is studied. The Eddington approximation for the radiative transfer is applied and the effects of radiation losses on the stability pattern are discussed. It is found that the diffusion approximation leads to a considerable overestimation of the growth rates of the unstable modes. The results are applied to an actual flux tube under solar-type condition, and the results and their consistency with the various approximations introduced in the model are discussed.
Tipologia CRIS:
03A-Articolo su Rivista
Elenco autori:
Massaglia, S.; Rossi, P.; Bodo, G.
Link alla scheda completa:
https://iris.unito.it/handle/2318/104597
Pubblicato in:
ASTRONOMY & ASTROPHYSICS
Journal
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