Magnetic reconnection and particle accelerationinitiated by flux emergence

Details Magnetic reconnection and particle accelerationinitiated by flux emergence Magnetic reconnection and particle accelerationinitiated by flux emergence

Nov 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008sf2a.conf..555m&link_type=abstract

"SF2A-2008: Proceedings of the Annual meeting of the French Society of Astronomy and Astrophysics Eds.: C. Charbonnel, F. Combes

Astronomy and Astrophysics

Astrophysics

Scientific paper

So as to perform an MHD simulation of the evolution of the corona driven by the evolution of the photosphere, a key aspect is the definition of the boundary conditions for reaching a good compromise between physical conditions and numerical constraints. In this work, we focused on the simulation of a confined flare observed on Nov 16, 2002. As initial configuration, we considered a uniform temperature corona, with a magnetic field resulting from a 3D potential field extrapolation from a SOHO/MDI magnetogram. We prescribed a velocity field at the photospheric boundary of the domain, so as to mimic the observed flow pattern associated to a flux emergence. This resulted in a combination of ``slipping reconnection'' in a halo of QSLs surrounding a 3D null point, through which a ``fan reconnection'' regime took place. This simplified approach of flux emergence has successfully reproduced the main characteristics of the observed flare: the flare ribbons observed in the EUV with TRACE being due to the chromospheric impact of particles accelerated along reconnecting field lines, this bimodal regime could explain both the shapes and dynamics of these ribbons. We foresee that this kind of modeling should be able to simulate the evolution of slipping magnetic flux tubes in open configurations, allowing to predict the spatio-temporal evolution of particle beams injected into the heliosphere.

Affiliated with

Also associated with

No associations

Rating

Magnetic reconnection and particle accelerationinitiated by flux emergence does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Magnetic reconnection and particle accelerationinitiated by flux emergence, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Magnetic reconnection and particle accelerationinitiated by flux emergence will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1287919