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SOLAR PROMINENCE INTERACTIONS C. Richard DeVore1
 

Summary: SOLAR PROMINENCE INTERACTIONS
C. Richard DeVore1
and Spiro K. Antiochos2
Naval Research Laboratory, Washington, DC 20375
and
Guillaume Aulanier
Laboratoire d'Etudes Spatiales et d'Instrumentation en Astrophysique, Observatoire de Paris, 91295 Meudon Cedex, France
Received 2005 April 6; accepted 2005 May 5
ABSTRACT
We report numerical simulations of the formation, interaction, and magnetic reconnection between pairs of solar
prominences within the sheared-arcade model. Our experiments consider the four possible basic combinations of
chiralities (identical or opposite) and axial magnetic fields (aligned or opposed) between the participating prom-
inences. When the topology of the global flux system comprising the prominences and arcades is bipolar, so that
a single polarity inversion line is shared by the two structures, then identical chiralities necessarily imply aligned
axial fields, while opposite chiralities imply opposed axial fields. In the former case, external magnetic reconnec-
tions forming field lines linking the two prominences occur; in the latter, such reconnections are disfavored, and no
linkage takes place. These results concur with empirical rules for prominence interactions. When the topology
instead is quadrupolar, so that a second polarity inversion line crossing the first lies between the prominences, then
the converse relation holds between chirality and axial-field alignment. External reconnections forming linking
field lines now occur between prominences with opposite chiralities; they also occur, but result only in footpoint ex-

  

Source: Aulanier, Guillaume - Observatoire de Paris

 

Collections: Physics