Abstract
Aims. We study the breakout model using multiple flux emergence to produce the magnetic configuration and the trigger. We do not
impose any artificial motions on the boundaries. Once the original flux tube configuration is chosen the system is left to evolve itself.
Methods. We perform non-linear simulations in 2.5D by solving the compressible and resistive MHD equations using a Lagrangian
remap, shock capturing code (Lare2D). To produce a quadrupolar configuration from flux emergence we build on previous work
where the interaction of two flux tubes forms the required quadrupole. Instead of imposing a shearing flow, a third flux tube is then allowed to emerge up through the central arcade.
Results. Breakout is not achieved in any of the experiments. This is due to the interaction of the third tube with the quadrupole and
the effect of the plasma beta being O(1) at the photosphere and beta >= O(1) in the solar interior. When beta is of these orders, flows generated
in the plasma can influence the magnetic field and so photospheric footpoints do not remain fixed.
Original language | English |
---|---|
Pages (from-to) | 761-768 |
Number of pages | 8 |
Journal | Astronomy and Astrophysics |
Volume | 501 |
Issue number | 2 |
DOIs | |
Publication status | Published - Jul 2009 |
Externally published | Yes |
Keywords
- Magnetic fields
- Magnetohydrodynamics (MHD)
- Numerical simulation
- Flux emergence