The physics of twisted magnetic tubes rising in a stratified medium: two dimensional results

Details The physics of twisted magnetic tubes rising in a stratified medium: two dimensional results The physics of twisted magnetic tubes rising in a stratified medium: two dimensional results

1997-11-05

arxiv.org/abs/astro-ph/9711043v2

Astronomy and Astrophysics

Astrophysics

To be published in ApJ, Vol. 492, Jan 10th, 1998; 25 pages, 16 figures. NEW VERSION: THE PREVIOUS ONE DIDN'T PRINT CORRECTLY.

Scientific paper

10.1086/305074

The physics of a twisted magnetic flux tube rising in a stratified medium is studied using a numerical MHD code. The problem considered is fully compressible (no Boussinesq approximation), includes ohmic resistivity, and is two dimensional, i.e., there is no variation of the variables in the direction of the tube axis. We study a high plasma beta case with small ratio of radius to external pressure scaleheight. The results obtained can therefore be of relevance to understand the transport of magnetic flux across the solar convection zone.

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