MAGNETIC TOPOLOGY OF CORONAL HOLE LINKAGES

The Magnetic Topology of Coronal Mass Ejection Sources

In an attempt to test current initiation models of coronal mass ejections (CMEs), with an emphasis on the magnetic breakout model, we inspect the magnetic topology of the sources of 26 CME events in the context of their chromospheric and coronal response in an interval of approximately nine hours around the eruption onset. First, we perform current-free (potential) extrapolations of photospheri...

Topology of random linkages

Betti numbers of configuration spaces of mechanical linkages (known also as polygon spaces) depend on a large number of parameters – the lengths of the bars of the linkage. Motivated by applications in topological robotics, statistical shape theory and molecular biology, we view these lengths as random variables and study asymptotic values of the average Betti numbers as the number of links n t...

Coronal Magnetic Field Topology over Filament Channels: Implication for Coronal Mass Ejection Initiations

The magnetic field topology at the coronal mass ejection (CME) source regions has been one of the major focuses of CME initiationmodels.While the ‘‘breakout’’ model requires a quadrupolar magnetic topology in the solar corona to enable an eruption, other models have shown that a bipolar magnetic topology can be the source region of a CME. In this paper, we use observational data and a potential...

Reconstruction of Solar Coronal Linear Force-Free Magnetic Field

Topologically driven coronal dynamics – a mechanism for coronal hole jets

Bald patches are magnetic topologies in which the magnetic field is concave up over part of a photospheric polarity inversion line. A bald patch topology is believed to be the essential ingredient for filament channels and is often found in extrapolations of the observed photospheric field. Using an analytic source-surface model to calculate the magnetic topology of a small bipolar region embed...