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A&A 430, 10671087 (2005) DOI: 10.1051/0004-6361:20041519
 

Summary: A&A 430, 1067­1087 (2005)
DOI: 10.1051/0004-6361:20041519
c ESO 2005
Astronomy
&
Astrophysics
Equilibrium and observational properties
of line-tied twisted flux tubes
G. Aulanier1, P. Démoulin1, and R. Grappin2
1
Observatoire de Paris, LESIA, 92195 Meudon Cedex, France
e-mail: [guillaume.aulanier;pascal.demoulin]@obspm.fr
2
Observatoire de Paris, LUTH, 92195 Meudon Cedex, France
e-mail: roland.grappin@obspm.fr
Received 23 June 2004 / Accepted 19 September 2004
Abstract. We describe a new explicit three-dimensional magnetohydrodymanic code, which solves the standard zero-
MHD equations in Cartesian geometry, with line-tied conditions at the lower boundary and open conditions at the other ones.
Using this code in the frame of solar active regions, we simulate the evolution of an initially potential and concentrated bipolar
magnetic field, subject to various sub-Alfvénic photospheric twisting motions which preserve the initial photospheric vertical

  

Source: Aulanier, Guillaume - Observatoire de Paris

 

Collections: Physics