Bibcode
Mueller, Daniel; Schlichenmaier, R.; Fritz, G.; Beck, C.
Referencia bibliográfica
American Astronomical Society, SPD meeting #37, #7.07; Bulletin of the American Astronomical Society, Vol. 38, p.229
Advertised on:
6
2006
Número de citas
0
Número de citas referidas
0
Descripción
Sunspot penumbrae harbor highly structured magnetic fields and flows.
The moving flux tube model offers an explanation for several observed
phenomena, e.g. the Evershed effect and bright penumbral grains. In this
work, we present a generalized 3D model that embeds an arbitrarily
shaped flux tube in a stratified magnetized atmosphere. The new model is
a versatile tool to calculate the spectral signature of flux tubes in
the penumbra and especially make predictions about the flow speed and
tube inclination from observed maps of the net circular polarization
(NCP). As a first result, we find that the inclination of downflows in
the outer penumbra must be shallower than approx. 15°.